The TARDIS is pulled down to the barren world of Vortis. The Doctor and Ian explore. Barbara falls under an hypnotic influence and is compelled to leave the safety of the TARDIS.

The Master is behind the Keller Machine and uses it to recruit the rioting inmates at Stangmoor Prison. He plans to capture a missile and fire it at the World Peace Conference.

Before his career as a stuntman, Tip Tipping served in the Royal Marines and the SAS. As well as Doctor Who, he worked on TV series including The Bill and Bottom, plus films including Never Say Never Again, Batman and Indiana Jones and the Last Crusade. He also played Private Crowe in Aliens. In addition, he served on the Equity Council and was a founder member of the Stunt Ball, held every year to raise money for children's charities. Tipping died in a parachuting accident during filming for the BBC1 docudrama series 999.

Donald Sumpter  is a British actor. He has appeared infilm and television since the mid 1960s.

One of his early television appearances was the 1968 Doctor Who serial The Wheel in Space with Patrick Troughton as the Doctor. He appeared in Doctor Who again in the 1972 serial The Sea Devils with Jon Pertwee. He also appeared in the Doctor Who spin-off The Sarah Jane Adventures. 

His early film work included a lead role as real life British criminal Donald Neilson in the 1977 film, The Black Panther.

He also appeared in many television films and serials, including adaptations of Dickens' novels: Nicholas Nickleby in 2001, Great Expectations in 1999 and Bleak House in 1985. Also in 1985, he was remembered for the part of villain Ronnie Day in Big Deal. He played the part of suspected serial killer Alexander Bonaparte Cust in the (1992) Agatha Christie's Poirot episode, The ABC Murders. He has also appeared in episodes of Midsomer Murders, The Bill, Holby City, and A Touch of Frost. He also had a recurring role as Uncle Ginger in the Children's BBC series The Queen's Nose. He played Harold Chapple in Our Friends in the North, and portrayed the physicist Max Planck in Einstein and Eddington. He has also been seen as Kemp in the horror-drama series Being Human

His film appearances include The Constant Gardener (2005), K-19: The Widowmaker (2002), Enigma (2001) and Ultramarines: The Movie (2010).

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

Patrick Godfrey  is a British actor of film, television and stage.

Godfrey was born in the United Kingdom, the son of Lois Mary Gladys (née Turner) and Frederick Godfrey.

He made his film debut in 1972's Miss Julie, and appeared in several British films of the 1980s, 1990s and 2000s, including A Room with a View, The Remains of the Day, The Importance of Being Earnest and The Count of Monte Cristo. He also playedLeonardo da Vinci in the Cinderella adaptation Ever After alongside Drew Barrymore and Dougray Scott. He has also had many roles on television, appearing in Doctor Who, Inspector Morse and other series.

He has been married to actress Amanda Galafres Patterson Walker since 20 April 1960 and they have two children.

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Barbara Shelley is an English film and television actress, often dubbed "The First Leading Lady of British Horror" 

She was at her busiest in the late 1950s (Blood of the Vampire) and 1960s when she became Hammer Horror's number one female star, with The Gorgon (1964), Dracula, Prince of Darkness (1966), Rasputin, the Mad Monk (1966), and Quatermass and the Pit (1967) among her credits. Although she is known as a scream queen, in fact her most famous scream (in the aforementioned Dracula film) was dubbed by co-star Suzan Farmer.

She also appeared in Village of the Damned (1960) and in the 1984 Doctor Who serial Planet of Fire.

David Neal was a popular British television actor, active in the 1960s, '70s, '80s and '90s. He is chiefly remembered for a prolific range of supporting roles in major productions.

Although very rarely cast in a lead role, David Neal had significant supporting roles in episodes of a great range of highly popular British television series, including Softly, Softly, Z-Cars, Doctor Who, Inspector Morse, Poirot, The Bill, and Wycliffe

David Neal worked in a broad range of roles during his career. In 1970 he took a major supporting role (Cinna) in the all-star feature film of Shakespeare's Julius Caesar (which starred Charlton Heston,Christopher Lee, Richard Chamberlain, Diana Rigg, and Sir John Gielgud). A few years later (in 1979) he secured another significant supporting role as Richard le Scrope, Archbishop of York in both Henry IV, Part 1 and Henry IV, Part 2 in the BBC's major 'complete works of Shakespeare' series of television films.

Although not remembered for lead roles, an exception is the 1970s' children's television production The Flockton Flyer, written by Peter Whitbread, in which David Neal starred as the principal character, Bob Carter. The programme ran to two series, with an associated paperback novel.

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Joseph Fürst was an Austrian international film and television actor known for his English language roles.

Furst was regularly featured in UK television drama series of the 1960s and early 1970s with appearances in The Saint, The Champions, Doomwatch, The Persuaders!, and as the mad (and well remembered) Professor Zaroff in the Doctor Who story The Underwater Menace. Many people believe his accent in this role to have been put on; this is incorrect, it is in fact his real accent.

Joseph Furst's notable film appearances included 55 Days at Peking (1963), The Brides of Fu Manchu (1966), Inn of the Damned (1975), and Diamonds Are Forever (1971) as Dr Metz.

He emigrated to Australia and starting in the mid 1970s acted in several guest roles on Australian television drama series. His roles included several appearances in the top-rated police drama Division 4 produced by Crawford Productions in the 1970s. He also had on-going roles in soap opera Number 96 in 1976 as deli owner Carlo Lenzi who romanced Norma Whittaker (Sheila Kennelly), and as Heinrik Smeaton in The Young Doctors in 1979. He later guest starred in four episodes of A Country Practice in the early 1980s.

Joseph was interviewed by Dwayne Bunney and Dallas Jones for "Loose Cannon" and spoke about his career in an interview to be an extra feature for the reconstruction of the missing Doctor Who story "The Underwater Menace". This interview took place shortly before his death.

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Jenny Laird (13 February 1912 – 31 October 2001) was a British film and television actress.

She trained at the Royal Academy of Dramatic Art. Until 1965, RADA awarded an annual Jenny Laird Prize for ''achievement in a thankless role''.

Other roles include Inspector Morse, All Creatures Great and Small, The Masks of Death, Hammer House of Horror, The Second Part of King Henry the Fourth, including his death and the coronation of King Henry the Fifth, A Family Affair, Secret Army, Lillie, 1990, Within These Walls, Justice, Shoulder to Shoulder, Thriller, The Onedin Line, The Forsyte Saga, This Man Craig, Z Cars, Dr. Finlay's Casebook, Disneyland, The Human Jungle, Drama 61-67, Maigret, Ghost Squad, ITV Play of the Week, Armchair Theatre, Village of the Damned, Conspiracy of Hearts, The Flying Doctor, The Vise, Face in the Night, Adventure Theater, Gilbert Harding Speaking of Murder, The Princess and the Swineherd, Life in Her Hands, Spring at Marino, The Long Dark Hall, Lady Precious Stream, Your Witness, Kid Flanagan, Black Narcissus, Beware of Pity, A Voice in the Night, Painted Boats, Browned Off, The Lamp Still Burns, Just William, An Expert in Crime, Murder on the Second Floor, Black Eyes, What a Man!, Hay Fever, Lily of Laguna, The House of Silence, Auld Lang Syne, The Last Chance, Passenger to London, The Morals of Marcus 

Patrick Barr was a British film and television actor.

He appeared in the 1967 story The Moonbase

Born in Akola, India, Patrick Barr went from stage to screen with The Merry Men of Sherwood(1932). He spent the 1930s playing various beneficent authority figures and "reliable friend" types. As a conscientious objector during the Second World War, Barr helped people in the Blitz in London's East End before serving with the Friends Ambulance Unit in Africa. There he met his wife Anne "Jean" Williams, marrying her after ten days; it would have been sooner, but they had to get permission from London. They stayed together ever afterwards.

In 1946, he picked up where he left off, and in the early 1950s, he began working in British television, attaining popularity that had undeservedly eluded him while playing supporting parts in such films as The Case of the Frightened Lady (1940) and The Blue Lagoon (1949).

This latter-day fame enabled Barr to insist upon better roles and command a higher salary for his films of the 1950s and 1960s: among the films in which he appeared during this period were The Dam Busters (1955),Room in the House Randall & Hopkirk Deceased 1968 episode "You can always find a fallguy"(1955), Saint Joan (1957), Next to Next Time (1960),Billy Liar (1963), The First Great Train Robbery (1979) and Octopussy(1983). In the 1981 BBC4 radio adaptation of The Lord of the Rings, Barr voiced the role of Gamling.

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As well as appearing in three Doctor Who stories during its classic era, Hugh Walters also played the character of Vic Thatcher in the 1970s version of the BBC TV series Survivors, which was created by Terry Nation and produced by Terence Dudley.

T P McKenna as an Irish actor who worked on stage, in film and television in Ireland and the UK from the 1950s.

McKenna was born in Mullagh, County Cavan. During the 1960s and 1970s he appeared regularly in popular television dramas, including The Avengers (1964, 1965, 1968), Danger Man (1965),The Saint (1966, 1968), Adam Adamant Lives! (1967), Jason King (1972), The Sweeney (1975), Blake's 7 (1978), Minder (1984) and in the Doctor Who serial The Greatest Show in the Galaxy.

He played Richmond in the Thames Television series Callan (1972) and made ten appearances in Crown Court (1974–1982), mainly as barrister Patrick Canty, while also appearing in the popular ATV anthology drama series Love Story (1965-1968). He also featured prominently in other television dramas including The Duchess of Malfi (1972), The Changeling (1974), Holocaust (1978), The Manions of America (1981), To The Lighthouse (1982), Bleak House (1985), Strong Medicine (1986), Jack the Ripper (1988),Shoot to Kill (1990), Scarlet and Black (1993) and the final episode of Inspector Morse (2000).

He had prominent film roles in Ulysses (1967), Sam Peckinpah's film Straw Dogs (1971) where he appeared alongside Dustin Hoffman and A Portrait of the Artist As A Young Man (1977). Other film credis include The Charge of the Light Brigade (1967), Anne of the Thousand Days (1969), Perfect Friday (1970), Villain (1971), All Creatures Great and Small (1975), Mehmed My Hawk (1988), Pascali's Island (1988), The American (1998), Monarch (2000) and The Libertine (2004).

He narrated the Emmy-winning documentary Is There One Who Understands Me (RTE, 1982).

On stage he appeared with leading theatre companies, including the Abbey Theatre, Dublin, the Royal Shakespeare Company and the Royal National Theatre Company. He was a member of the Abbey Theatre company from 1953 to 1962 performing in over seventy roles. In 1967 he was made an honorary life member of the company along with Cyril Cusack, Siobhan McKenna and Jack McGowran.

He joined Stuart Burge's company at the Nottingham Playhouse in 1968 playing Trigorin in The Seagull and Sir Joseph Surface in Sheridan's School For Scandal, both directed by Jonathan Miller. In 1969 he created the role of Fitzpatrick in David Storey's 'The Contractor' directed by Lindsay Anderson at the Royal Court Theatre, London. The production later transferred to the Fortune Theatre and ran for over a year. In 1973 to took on the role of Andrew Wyke opposite his friend Donally Donnelly in the Irish premiere of Peter Shaffer's 'Sleuth'. The production played to acclaim in both Dublin and Cork and it broke the box office record for the Olympia Theatre.

Later that year he joined the Royal Shakespeare Company and took over the role of Roberts Hands in James Joyce's only play, 'Exiles' directed by Harold Pinter. In the same season he also appeared in a rare staging of Jean Genet's 'The Balcony' directed by Terry Hands.

He returned to the RSC in 1976 for Shaw's 'The Devil's Disciple' directed by Jack Gold in a production to mark the American bicentennial celebrations as the revolutionary pastor Revd. Anderson.

In the late 1980s and 1990s he returned to the Dublin stage when he was invited by director Michael Colgan to join the Gate Theatre on a number of occasions including admired productions of Uncle Vanya, The Cherry Orchard and No Mans Land. It was there he created the role of Dr. Rice in Brian Friel's drama, Molly Sweeney, and again at London's Almeida Theatre. Other Friel productions he appeared in were The Communication Cord (Hampstead Theatre, 1984) and The Aristocrats (2004) at the RNT in his final stage appearance.

He directed on occasion, and had productions of J. M. Synge's The Playboy of the Western World (Nottingham Playhouse, 1968), Thomas Kilroy's The Death and Resurrection of Mr. Roche (Abbey Theatre, 1973) and Seán O'Casey'sThe Shadow of A Gunman (Crucible Theatre, Sheffield, 1980) to his credit. McKenna took the role of Phonsie Doherty in Christopher FitzSimon's Radio 4 comedy series, Ballylennon, and later appeared opposite David Threlfall in the radio drama Baldi.

He died at the Royal Free Hospital in London and is laid to rest alongside his wife, May, at Teampall Cheallaigh by the shores of Mullagh Lake in County Cavan.

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Max Faulkner, was a stunt man and actor who has small roles in six Doctor Who stories. He played a UNIT soldier in the 1970 Jon Pertwee story The Ambassadors of Death, and a miner in the 1974 story The Monster of Peladon. In Jon Pertwee's final story, Planet of the Spiders, he played the Guard Captain. 

Faulkner appeared with Tom Baker in three stories. In the 1975 story Genesis of the Daleks he played a Thal Guard before returning later in the year in The Android Invasion as Corporal Adams, a UNIT officer stationed at Devesham. His final appearance in 1978 was in The Invasion of Time where he played Nesbin, the leader of a group of Outsiders.

He was the fight arranger in the 1976 story The Hand of Fear.

Faulkner appeared in many British dramas such as Ivanhoe, The Adventures of Robin Hood, Richard the Lionheart, Colditz, Lorna Doone, Little Lord Fauntleroy, Secret Army,Blake's 7 and Robin of Sherwood.