The Master arrives, posing as an adjudicator from Earth who has come to settle the dispute between the colonists and the miners. However, he has an agenda of his own.

Sacha Dhawan is best known for his appearances in The History Boys and in Last Tango in Halifax. Other appearances include Being Human, Outsourced and The Deep.

Stunt performer in the 2012 story Dinosaurs on a Spaceship.

Also worked on Kick-Ass 2, Les Misérables, The Hollow Crown, Game of Thrones, Wrath of the Titans, John Carter, Captain America: The First Avenger, Blitz, Robin Hood, Clash of the Titans, Kick-Ass, Centurion, The Wolfman, Merlin, Valhalla Rising, Inkheart, The Mummy: Tomb of the Dragon Emperor, The Bank Job, The Golden Compass, The Bourne Ultimatum, True Dare Kiss, Harry Potter and the Order of the Phoenix, Life on Mars, Casino Royale, X-Men: The Last Stand, Blackbeard, Beowulf & Grendel, Batman Begins, Unleashed, The Number One Girl, Alexander, Bulletproof Monk, Below, Shura Yukihime, The Monkey King, Gladiator, Black Mask, Lorna Doone

Stefan Schwartz is an English/Canadian film and television director/writer plus a former actor, most known for the feature film Shooting Fish and his work for the BBC on Spooks, Luther and Dexter.

Stefan Schwartz teamed up with Richardinho Holmes at York University and formed The Gruber Brothers. The duo made a number of films together including, Bonded, broadcast on BBC 2, and the award-winning short The Lake starring Frances Barber. Stefan made his feature film debut with Soft Top Hard Shoulder (1992) starring Peter Capaldi and Phyllis Logan, which went on to win two BAFTA’s in Scotland and the London Film Festival’s prestigious audience award. Building on this success in 1995 he directed Giving Tongue, shown as part of BBC2′s Wicked Women series and in 1996 wrote and directed Shooting Fish, a crime-caper comedy starring Kate Beckinsale which won several awards and made over twenty million dollars worldwide.

He then signed a three-year deal to write and direct for Miramax and wrote screenplays for them, teaming up with notable producers such as Laurence Bender and Jennifer and Suzanne Todd before directing The Abduction Club (2001) for Pathe Films.

His next film as writer/director was the romantic comedy The Best Man starring Stuart Townsend, Amy Smart and Seth Green in 2004.

In television he directed Hustle, the award winning Spooks and The Ghost Train for Lynda La Plante before moving on to the ground-breaking series, Luther, for the BBC. In the US he has directed several episodes of the critically acclaimed Crash with Dennis Hopper, joined the Starz series Camelot, which he directed for and also co-executive produced, and directed for the much praised Dexter series.

After finishing Being Human for the Syfy Stefan directed in the final season of House and worked in New York on White Collar. He then went back to Showtime for another episode of Dexter. He is currently working in Paris with Jean Reno on the series "Jo" (working title). His next project is "The Walking Dead".

_{Biography from the Wikipedia article, licensed under CC-BY-SA}

Joanna Lumley was born in Srinagar, in the Indian state of Kashmir and Jammu. Her early life was spent in countries such as Hong Kong and Malaysia, as well as having English roots in Kent. Having been turned down by RADA at the age of 16, she attended the Lucie Clayton Finishing School, after which she became a photographic model.

She turned to acting in 1969, having minor roles in films such as Some Girls Do and in the James Bond film On Her Majesty's Secret Service and The Satanic Rites of Dracula, and on television shows such as Steptoe and Son and Are You Being Served; more substantial roles included Elaine Perkins in Coronation Street, a patient in General Hospital, and also appeared in Up The Workers. But it was in 1976 when she became a household name as Steed's sidekick Purdey in The New Avengers. This was followed up a couple of years later with another memorable role as Sapphire the intellectual sci-fi series Sapphire and Steel. Later television roles included Mrs Peacock in Cluedo, Kate Swift in Class Act, Donna Sinclair in Dr Willoughby, Davina Jackson in Sensitive Skin, Vivienne Roden in Mistresses, and Delilah Staff in Jam and Jerusalem, with other film appearances including Shirley Valentine, James and the Giant Peach, Corpse Bride, The Magic Roundabout, and The Wolf of Wall Street; however, her most famous identity is arguable the character of Patsy in Absolutely Fabulous.

In 1999 she became the first woman to play the Doctor in Doctor Who, appearing as the 'final' incarnation of the Time Lord in the Steven Moffat-penned Comic Relief special Doctor Who and the Curse of Fatal Death.

In more recent years she has made a number of documentary series, including Joanna Lumley in the Land of the Northern Lights, Joanna Lumley's Nile, Joanna Lumley's Greek Odyssey, and Joanna Lumley's Trans-Siberian Adventure.

As well on-screen work, she has also had an extensive career as a voice-over artist, with credits including the voice of greetings for AOL. She wrote her autobiography, No Room For Secrets, in 2005.

Outside of entertainment, Lumley became the face of Gurkha Justice Campaign, supporting the rights of the Nepalese part of the British Army. She is also a supporter of Survival International on the cause of indigenous rights. She received an OBE in 1995, and is a Fellow of the Royal Geographic Society. She was married to comedy writer Jeremy Lloyd, and in 1986 married conductor Stephen Barlow.

Adapted from the Wikipedia article.

Una Stubbs was a British actress, television personality, and dancer who appeared on British television, in the theatre, and occasionally in films.

She became known after appearing in the film Summer Holiday (1963) and later played Rita Rawlins in the BBC sitcoms Till Death Us Do Part (1965–1975) and In Sickness and in Health (1985–1992). Her other television roles include Aunt Sally in Worzel Gummidge (1979–1981) and Miss Bat in The Worst Witch (1998–2001). She also appeared as Sherlock Holmes's landlady Mrs. Hudson in the BAFTA-winning television series Sherlock (2010–2017).

James Copeland played Selris in the Doctor Who serial The Krotons.

Also worked on A Rage in Harlem, The Big Man, The Campbells, Brigadista, A Drop in the Ocean, Murder Not Proven?, The Citadel, The Privilege, King's Royal, Strangers, Maggie, The Walls of Jericho, Mackenzie, Square Mile of Murder, Doom Castle, High Road, Kidnapped, The Onedin Line, The Standard, The Mackinnons, Hazlitt in Love, Benny Lynch, Oil Strike North, Five Red Herrings, Crown Court, Sutherland's Law, The Donati Conspiracy, Are You Being Served?, Menace, The Brothers, The View from Daniel Pike, Z Cars, Adam Smith, Spy Trap, Out of the Unknown, Play for Today, Comedy Playhouse, Softly Softly: Task Force, The Main Chance, The Private Life of Sherlock Holmes, Dr. Finlay's Casebook, The Borderers, Redgauntlet, Dad's Army, The Revenue Men, The Flight of the Heron, Torture Garden, This Man Craig, The Big Catch, Dixon of Dock Green, Ransom for a Pretty Girl, The Troubleshooters, The Avengers, The Saint, ITV Play of the Week, Detective, Farewell Performance, Kidnapped, It Happened Like This, The Dark Island, Looking About, Rob Roy, Tunes of Glory, Emergency-Ward 10, Captain Moonlight: Man of Mystery, Redgauntlet, The 39 Steps, BBC Sunday-Night Theatre, The Flying Doctor, Rockets Galore!, The Battle of the River Plate, Kidnapped, You Lucky People, Mask of Dust, The Seekers

Joan Rodker was a political activist who later became television script editor and producer.

Born in 1915, her parents were the poet John Rodker and actress Sonia Cohen, and she was first brought up in care before living with her mother. Failing to get into university she instead engaged on a study of languages, first learning German and then Russian - meeting her husband, performer and former politcal prisoner Gerard Hinze.

During the Second World War she campaigned to have her husband released from internment in Canada, and when returning to England after the war she became involved in a number of causes, including organising peace conferences such as one in Sheffield in 1950, helping to open the Polish Cultural Institute, and organise the first Soho Fair. 

Turning to television, Rodker worked with the likes of Kenneth Tynan and Huw Weldon on seminal arts programmes such as Tempo and Monitor, and also worked alongside Verity Lambert in commissioning writers and script editing for Thirty Minute Theatre and Armchair Theatre. Spending a year in Mexico, she was the writer and narrator for the 1960 ITV documentary, Mexico of the Plumed Serpent, a Roving Report feature on the problems facing contemporary Mexico and the impact from its colonial period - something designer Barry Newbery was to reference for The Aztecs with its inclusion of ruins. Rodker was herself brought on board the Doctor Who production as a freelance researcher.

Other work on television included being an editor on 1974's Late Night Drama, script executive and later executive producer for Armchair Thriller, and producer for ITV Playhouse in the 1980s.

She died in 2010, survived by her son Ernest and her grandchildren Oliver and Joel.

Simon Cain appeared in two Doctor Who stories: as Curly in The Enemy of the World and a Silurian in Doctor Who and the Silurians.

Also appeared in Carry on at Your Convenience, Doomwatch, Ryan International, Manhunt, Carry on Again Doctor, The Most Dangerous Man in the World, School for Sex, Carry On... Up the Khyber, The Blood Beast Terror, Carry on Doctor, Follow That Camel, No Hiding Place, Carry on Cowboy, Whiplash

Terry Duggan  was a comedian and actor who had a successful career in cabaret and variety and played numerous character roles on television. He was married to the actress Anna Karen, best known for playing the part of Olive in the ITV sitcom On the Buses, in which Duggan frequently appeared.

Duggan was born in Hoxton, London. From the 1960s through the 1980s, he appeared on such television series as Are You Being Served?, The Bill, Bob Martin, Only Fools and Horses,Please Sir! and Randall and Hopkirk (Deceased). His film appearances included 2001 A Space Odyssey. He also performed pantomime, frequently teaming with his wife Anna Karen.

He was also a stand-up comedian who was noted for his drunk sketches in which he portrayed an inebriated man, a concept earlier popularised by Freddie Frinton and Jimmy James. Besides practicing theatrical performance from childhood, he learned acrobatics which led to film stuntman roles. Duggan was also a member of the entertainers' charity The Grand Order of Water Rats.

Bernard Joseph Archard  was an English actor.

Born in Fulham, London,he was a tall, imposing actor with a distinctive face. He was a conscientious objector in the Second World War and worked on the land. During the summer of 1939 he appeared in the Open Air Theatre production of "Twelfth Night" in London.

He appeared in over fifty films, including Village of the Damned (1960), The List of Adrian Messenger (1963), Play Dirty (1968), The File of the Golden Goose (1969), Run a Crooked Mile (1969), The Horror of Frankenstein (1970), Roman Polanski's Macbeth (1971), Dad's Army (1971), The Day of the Jackal (1973), The Sea Wolves (1980), Krull (1983), and King Solomon's Mines (1985).

Archard's first major television role was playing Lt Col. Oreste Pinto in the BBC wartime drama series Spycatcher, which ran for four seasons between 1959 and 1961. His TV guest appearances represent some of the most popular shows broadcast in the 1960s, 1970s and 1980s: two notable roles in Doctor Who; as Bragen in The Power of the Daleks and as Marcus Scarman in Pyramids of Mars, a regular role in Emmerdale; plus appearances in Upstairs, Downstairs, Rumpole of the Bailey, Bergerac, The Avengers, Callan, Danger Man, Z Cars, Paul Temple, Dixon of Dock Green, and The Professionals.

Archard and his long term partner, Jim Belchamber, ran a touring repertory company, based in Torquay, which included Hilda Braid among its players.

_{Biography from the Wikipedia article, licensed under CC-BY-SA}

John Nathan-Turner is, to date, the longest-serving producer of Doctor Who, having worked on the show for 20 years.

He cast three Doctors - Peter Davison, Colin Baker and Sylvester McCoy - and numerous companions.

Born and raised in Birmingham, Nathan-Turner left King Edward VI School for Birmingham's Alexandra Theatre, where he acted and worked as assistant stage manager. He joined the BBC in London in 1968, where he also worked on a number of drama series, such as All Creatures Great And Small, The Pallisers, and Angels.

His first job on Doctor Who was in 1969 as floor assistant on The Space Pirates (alongside Patrick Troughton's Doctor) under the name John Turner, as there was already a Jonathan Turner in the industry. In the 1970s, he became assistant floor manager, then production unit manager, and when incumbent producer Graham Williams left in 1980 Nathan-Turner was an obvious successor.

During Nathan-Turner's first season in charge, Tom Baker, the fourth and longest-serving Doctor, announced he would be giving up the role. Nathan-Turner cast Peter Davison, an actor he knew from his work on All Creatures Great and Small.

Nathan-Turner was in charge for the 20th-anniversary story, The Five Doctors, in 1983. He worked round the problem of  First Doctor William Hartnell no longer being alive by casting  lookalike Richard Hurndall.

When Davison left the series in 1984, Nathan-Turner took on Colin Baker, best known at the time for his role in The Brothers.

When BBC1 Controller Michael Grade ordered that the show be suspended and Colin Baker replaced, Nathan-Turner cast the Seventh Doctor, picking light entertainer Sylvester McCoy. Doctor Who was scheduled against Coronation Street leading to a decline in ratings.

Even when the BBC pulled the plug on the series in December 1989, Nathan-Turner's involvement continued. The demand for Who products - documentaries, interviews, radio serials, conventions - led to him becoming the corporation's unofficial consultant. He co-wrote a Doctor Who skit for the 1993 Children in Need telethon, advised the monthly Doctor Who Magazine, corresponded with fans, gave interviews with fanzines and attended conventions.

As the show's last producer before its cancellation in 198i9, Nathan-Turner is often associated with the decline and fall of Doctor Who. But while budgetary constraints never allowed him to exterminate the wobbly sets, fancy-dress shop aliens and uncrowded crowd scenes, his era produced some of the series' most memorable moments: the surprise return of the Doctor's arch-enemy, the Master (1981); the shocking death of one of his companions (1982); and a Dalek actually going up the stairs (1988).

Shortly before his death, Nathan-Turner was writing and devising a children's television series, which was to have been narrated by Tom Baker. 

George Pravda was a Czechoslovakian film and television actor.

He began his career in Czechoslovakia under his own name, and then emigrated to the United Kingdom and anglicised his name to George.

He then appeared in numerous British films and television series.

His film credits include: Operation Amsterdam (1959), The Password Is Courage(1962), Thunderball (1965), Frankenstein Must Be Destroyed (1969), Hanover Street (1979) and Firefox (1982).

As well as his three appearances in Doctor Who, other TV appearances include: No Hiding Place, The Avengers, The Saint, The Baron,The Prisoner, Special Branch, Department S, Callan, Softly, Softly, Doomwatch, Codename, Public Eye, Spy Trap, Moonbase 3, Colditz, I, Claudius,The Duchess of Duke Street, 1990, The Professionals, The Onedin Line, Tinker, Tailor, Soldier, Spy, Chessgame and Bulman.