Jeremy Radick played Gareth in the Doctor Who TV Movie.

Raised in Victoria, British Columbia,  Radick  began acting at the age of six. 

His television debut came when he starred as a series regular on the children's series "Time Exposures". Since then, he has guest starred in such TV series as "Neon Rider", "The X-Files", "The Marshal" and "Honey, I Shrunk the Kids". At the age of thirteen, he starred in Anne Wheeler's film Angel Square (1990), and was a series regular on CBC's "Max Glick" (1990) and "The Odyssey" (1992). A graduate of New York's respected Circle in the Square Theatre School, Jeremy most recently appeared in "Beer Money" for the USA network, and co-starred in "Sasquatch" AKA "The Untold".

Radick has been in several stage productions throughout Canada, most notably appearing in the long-running play "Shear Madness", in the Vancouver and Toronto productions, respectively.

In addition,  Radick  is a co-founder of Vancouver's The Fox & Hounds Theatre Company. He has appeared in most of their productions, as well as producing and directing several shows.

Stephan Pehrsson is a Danish cinematographer who began his Doctor Who career on The Pandorica Opens and The Big Bang — both directed by his former film school classmate, Toby Haynes.

Much of his work in the late 1990s and early 2000s was in Denmark.

During the 2005-2006 season, he was the director of photography on a long run of episodes of Doctors. The next year he worked on Bad Girls. In 2007 he began to work on a number of shows that Toby Haynes also had worked on — Coming Up, M.I. High, and Holby Blue — though they only worked together on M.I. High. He also began a three-year stint on Holby City. Like Haynes, then, he had a fairly extensive relationship with Kudos Film and Television — the same production company for which Piers Wenger and Beth Willis worked while making programmes in the Life on Mars franchise. In 2009, Pehrsson was the cinematographer on a few episodes of Hustle. Immediately prior to his work on the series 5 Doctor Who finalé, he re-teamed with Haynes on Five Days, starring David Morrissey.

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

Clare Higgins is an award-winning English actress.

On stage she appeared in the premiere of The Secret Rapture. She was awarded the Laurence Olivier Theatre Award in 1995 (1994 season) for Best Actress in a Play for her performance in Sweet Bird of Youth at the Royal National Theatre. She won the same award in both 2002 and 2005: in 2002 for her performance in Vincent in Brixton performed at the Royal National Theatre, and in 2005 for her performance as Hecuba in the Euripides tragedy at the Donmar Warehouse. 

She was awarded the 2002 London Critics' Circle Theatre Award for Best Actress for her performance in Vincent in Brixton. Additionally, she was awarded the 1994 London Critics Circle Theatre Award (Drama Theatre) for Best Actress for her performances in The Children's Hour and Sweet Bird of Youth. She was also awarded the 2002 London Evening Standard Theatre Award for Best Actress for her performance in Vincent in Brixton at the Donmar Warehouse in London. In 2003 she was nominated for a Tony Award as Best Actress in a Play for Vincent in Brixton on Broadway, and garnered the 2003 Theatre World Award for outstanding major Broadway debut.

In 1983, she starred with Ben Cross in the BBC production of A.J. Cronin's The Citadel, playing the role of Christine Manson. For the big screen, she played Julia Cotton in the Clive Barker directed Hellraiser. 

Don Henderson was an English actor whose film and TV work covered many years but is best remembered for his role as the fictional detective George Bulman. This character featured in three TV series The XYY Man in the mid-1970s; the later Strangers that saw Bulman rise from Detective Sergeant to Detective Chief Inspector and, in 1985, the series Bulman saw George retired from the police and pursuing a career as a horologist. He also starred in the popular TV drama series Warship.

He lived in his adopted home town of Stratford-upon-Avon for many years, where he was a familiar face to locals. He also had several minor roles at the Royal Shakespeare Theatre in the town. In the late 1970s as a relatively unknown actor, whilst walking in Stratford, he was approached by an American tourist who recognised him as having starred in Star Wars, and offered him a thousand dollars in cash for his script. Sadly, Don had thrown it away.

Henderson died of throat cancer. His widow is the actress Shirley Stelfox with whom he appeared professionally many times.

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

After leaving school he went to work as a reporter on the South London Observer where he shared an office with a young Kelvin Mackenzie, future editor of The Sun, teaching the budding journalist to type.

He was a longstanding member of The Actor's Church Union, based at the actor's church, St Paul's in Convent Garden, London. He also served on the union's committee.

In 1968 he co-wrote, with Chris Shaw, A Pictorial History of Female Impersonation. In pantomime, Oates was a well known pantomime dame and 'ugly sister'.

In the 1970s he appeared with Fiona Richmond in the long running Paul Raymond revue, Pajama Tops, at London's Whitehall Theatre.

Tutte Lemkow  was a Norwegian actor and dancer, who played mostly villainous roles in British television and films. His chief claims to mainstream familiarity were his roles as "the fiddler" in the film version of Fiddler on the Roof and the old man ("Imam") who translates for Indiana Jones inRaiders of the Lost Ark. He also appeared as a dancer in John Huston's 1952 film Moulin Rouge and Blake Edwards' A Shot in the Dark as the Cossack who drinks the poison intended for Peter Sellers' Inspector Clouseau. Lemkow also appeared in the Sellers films The Wrong Arm of the Law, The Wrong Box and Ghost in the Noonday Sun as well as Woody Allen's Love and Death.

Lemkow was born in Oslo, Norway of Jewish heritage. He played three roles in Doctor Who with William Hartnell's Doctor: Kuiju in Marco Polo (1964), Ibrahim in The Crusade (1965) and Cyclops in The Myth Makers(1965), as well as providing choreography for The Celestial Toymaker (1966). He also appeared in the Morecambe and Wise comedy film The Intelligence Men (1965).

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

Dudley Jones played John Dyson in the Doctor Who serial The Tenth Planet.

many other appearances including in Summer Season, Number 10, The Citadel, Airline, Shine on Harvey Moon, The Borgias, Very Like a Whale, Suez 1956, I Didn't Know You Cared, Rosie, People Like Us, The Strange Case of the End of Civilization as We Know It, The Flockton Flyer, Yes, Honestly, Armaguedon, Romance, The Government Inspector, Dickens of London, Forget Me Not, The Onedin Line, Rentaghost, The Georgian House, How Green Was My Valley, Father Brown, The Kids from 47A, Beryl's Lot, Roberts Robots, BBC Play of the Month, The Hole in the Wall, The Sextet, Under Milk Wood, ITV Sunday Night Theatre, All Gas and Gaiters, The Troubleshooters, Manhunt, Doomwatch, Randall and Hopkirk (Deceased), On Her Majesty's Secret Service, Paul Temple, Parkin's Patch, The Virgin Soldiers, As You Like It: An Introduction, The Ronnie Barker Playhouse, Write a Play, Softly Softly, The Man in Room 17, Mystery and Imagination, The Liars, Blackmail, Undermind, A Tale of Two Cities, No Hiding Place, Jezebel ex UK, ITV Play of the Week, The First Gentleman, They Met in a City, The Pursuers, BBC Sunday-Night Play, Friends and Neighbours, Emergency-Ward 10, Black Furrow, BBC Sunday-Night Theatre, Treasure Island, Valley of Song, Robin Hood, The Marvellous History of St. Bernard, A Midsummer Night's Dream, A Run for Your Money, The Last Days of Dolwyn, Once a Jolly Swagman, The Wooing of Anne Hathaway

Clyde Pollitt was an actor from Merthyr Tydfil, Wales.

Roles include parts in Screen One, The Wars of the Roses, The Gentle Touch, The Life and Adventures of Nicholas Nickleby, Clayhanger, Moll Flanders, Churchill's People, Hawkeye, the Pathfinder, Z Cars, Softly Softly: Task Force, Callan, Ivanhoe, The Power Game, Softly Softly, Sherlock Holmes, Crossroads, The Citadel , How Green Was My Valley.

Francis Chagrin was a composer of film scores and popular orchestral music, as well as a conductor.

He was born in Bucharest, Romania, to Jewish parents and at their insistence studied for an engineering degree in Zurich while secretly studying at that city's music conservatoire. He graduated in 1928 but when his family failed to support his musical ambitions, left home and moved to Paris where he adopted his new, French-sounding name.

By playing in night clubs and cafes and writing popular songs, he funded himself though two years, from 1933, at the Ecole Normale, where his teachers included Paul Dukas and Nadia Boulanger, and settled in England in 1936.

At the outbreak of World War II, he was appointed musical adviser and composer-in-chief to the BBC French Service, and the programme, Les Francais parlent aux Francais. For this, he was decorated Officier d'Academie by the French government in 1948.

In 1951 he formed his own chamber ensemble. He composed the score for the 1955 film about Colditz, The Colditz Story. His harmonica work Romanian Fantasy was composed in 1956 for Larry Adler.

In 1959 he composed the theme and incidental music for the Sapphire Films TV series The Four Just Men for ITV.

In 1963, he won the Harriet Cohen International Music Award as "film composer of the year". The following year, he composed music for the 1965 Doctor Who television story The Dalek Invasion of Earth.

His son Nicolas was an actor, who was to appear in Vengeance on Varos some years later.