On This Day (USA) - 2 February

Invasion of the Dinosaurs: Part Four premiered on BBC One in 1974 at 5:34pm GMT, watched by 9.00 million viewers.

Sarah awakens to discover that she is on a spaceship that left Earth months ago and is heading for a new world. The Doctor is framed for causing the return of the dinosaurs.

Kinda: Part Two premiered on BBC One (Not Wales) in 1982 at 7:04pm GMT, watched by 9.40 million viewers.

Mawdryn Undead: Part Two premiered on BBC One in 1983 at 6:46pm GMT, watched by 7.50 million viewers.

Frontios: Part Three premiered on BBC One in 1984 at 6:40pm GMT, watched by 7.80 million viewers.

The Mark of the Rani: Part One premiered on BBC One in 1985 at 5:21pm GMT, watched by 6.30 million viewers.

Starring Colin Baker
A two-part story by Pip and Jane Baker
With the Luddites rioting, the Doctor arrives on Earth - but are they responsible for the trouble at Lord Ravensworth's coalmine?

Praxeus premiered on BBC One in 2020 at 7:11pm GMT, watched by 5.22 million viewers.

The gang try to make the connections between a missing astronaut, bird acting strangely in Peru and a US naval officer washed up on a Madagascan beach.

Ryan Watson was 29 - credited as Nathan Goss in The Lost Boy(SJA)

Ryan Watson is an English actor and voice actor.

He is best known for his role in the 2003 to 2004 series of Bernard's Watch, alongside Ezrah Roberts-Grey, reinvented as Bernard.

He has most recently appeared in the BBC Sarah Jane Adventures, in the Lost Boy episode, playing Nathan Goss.

In 2006, he performed at the Royal National Theatre as Andrea Sarti in David Hare's adaptation of The Life Of Galileo.

He has also recently voiced several characters for BBC Radio 4. He played the part of Prince Edward in the radio adaptation of Marlowe's Edward II for BBC Radio 3 in September 2009.

Remi Adefarasin was 74 - 3 credits, including Film Cameraman for Terminus

Remi AdefarasinOBEBSC (born London) is a British cinematographer. He is educated in Photography & Filmmaking at Harrow Art School. Started his career as camera trainee at BBC-tv's Ealing Studios.

He worked on two Doctor Who stories in 1983, Terminus and The King's Demons

His work on Elizabeth (1998) won him awards for Best Cinematography from BAFTA and the British Society of Cinematographers, as well as a "Golden Frog" from Camerimage and an Academy Award nomination.

Adefarasin was appointed Officer of the Order of the British Empire (OBE) in the 2012 New Year Honours for services to television and film.

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

Geoffrey Hughes (died 2012 aged 68) would have been 78 - credited as Popplewick in The Trial Of A Time Lord (The Ultimate Foe)

Geoffrey Hughes, was an English actor, best known for playing Eddie Yeats in the soap opera Coronation Street and Onslow in the sitcom Keeping Up Appearances.

He played Mr Popplewick in the 1986 Doctor Who story Trial of a Time Lord.

Among his many other appearances on television are: An Arrow for Little Audrey; The Saint; Shadows of Fear; Z-Cars; Randall and Hopkirk (Deceased); Flying Lady; Making Out; Coasting; Spender; and Boon. He played 'Trinculo' in an all filmed version of The Tempest for the BBC and 'Squire Clodpoll' in Good Friday 1663, one of Channel Four's new avant-garde operas. His comedy appearances on TV include The Likely Lads, Please Sir!, Dad's Army, Curry and Chips The Upper Hand and the character of Onslow in the BBC sitcom Keeping Up Appearances.

Hughes's film credits include: Smashing Time; Till Death Us Do Part; The Bofors Gun; The Virgin Soldiers; Adolf Hitler: My Part in His Downfall; Carry On At Your Convenience; and TV films: Needle and The Man from the Peru. He was also the voice of Paul McCartney in the Beatles' cartoon film Yellow Submarine.

Don Houghton (died 1991 aged 61) would have been 92 - 2 credits, including Writer for Inferno

Don Houghton was a British television screenwriter.

Born in Paris, Houghton started writing for radio in 1951 before moving into film and television in 1958. In the 1970s, he was a primary writer for Hammer Films including for Dracula AD 1972, The Satanic Rites of Dracula, The Legend of the 7 Golden Vampires and Shatter. 

His television work includes Doctor Who for which he wrote the serials Inferno (1970) and The Mind of Evil (1971), the fifth Sapphire & Steel television story (known informally as Dr McDee Must Die) co-written with Anthony Read, Emergency Ward 10, Crossroads, Ace of Wands, New Scotland Yard and The Professionals. Houghton created and wrote for the soap opera Take The High Road (1980). 

He has also written three novels: Column of Thieves and Blood Brigade and "Take the High Road: Summers Gloaming".

Margaret John (died 2011 aged 84) - 2 credits, including Megan Jones in Fury From the Deep
Margaret John was a Welsh acrtess. She appeared twice in Doctor Who, featuring in the 1968 Patrick Troughton story Fury from the Deep as Director of Euro Sea Gas, Megan Jones, and returning in the revived series as Grandma Connolly, victim to the Wire in The Idiot's Lantern. Speaking in a special programme dedicated to her in 2010 (Margaret John: National Treasure), she was quite proud of holding the title for the longest spanned appearances in Doctor Who until Bernard Cribbins came along (if you count the movies!).

John has had a varied career, with appearances on stage (The Vagina Monologues, Calendar Girls, soaps (Coronation Street, Crossroads), drama (Dixon of Dock Green, Z-Cars, The District Nurse), film (The Baker, Run Fatboy Run), and comedy (High Hopes, Satellite City); she also played alongside Torchwood star Eve Myles and Trevor Eve in the 2009 BBC Wales drama Framed. Her last role has yet to be seen, in an episode of new American fantasy series Game of Thrones.

She was awarded the Bafta Cymru Lifetime Achievement Award in 2009.

Donald Eccles (died 1986 aged 77) - credited as Krasis in The Time Monster

Donald Eccles  was a British character actor.

Eccles was born in NaffertonYorkshire the son of Charles Henry and Constance Eccles, his father was doctor. Eccles was educated at Highgate School and then worked in an insurance office.

He made his stage debut in New York City in 1930, and later became known as a member of the Royal Shakespeare Company. His debut in London was in Counsellor at Law in 1934 at the Picadilly. During the second world war he spent six years in the navy.

In 1960, he appeared in his first film, A Taste of Money, and continued to appear in small roles in film and television (such as Mr Justice Vosper in the second series of Rumpole of the Bailey) until his death, in a road accident, in Brighton.

He played Krasis in the Doctor Who story The Time Monster.

He worked on Blood Royal: William the ConquerorParadise PostponedThe Theban Plays by SophoclesThe Return of the AntelopeNever the TwainSilas Marner: The Weaver of RaveloeYoung Sherlock HolmesOliver TwistShine on Harvey MoonA Private FunctionDon't Wait UpFresh FieldsThe Master of BallantraeCrown CourtMinderThe DresserTom, Dick and HarrietTales of the UnexpectedComing Out of the IceThe Hunchback of Notre DameBrideshead RevisitedPlay for TodayLadykillersA Question of GuiltQuatermassThe Legend of King ArthurITV PlayhouseRumpole of the BaileyPeople Like UsSupernaturalI, ClaudiusLorna DooneKillersITV Sunday Night DramaThe Prince and the PauperYou're on Your OwnPublic EyeMicrobes and MenMarked PersonalThe Nine TailorsSpecial BranchThe Fortunes of NigelThe PallisersGreat MysteriesPianoramaThe Wicker ManThe ProtectorThe Upper CrustsCountry MattersEmmaITV Sunday Night TheatreThe Shadow of the TowerThe AdventurerSoftly Softly: Task ForceBBC Play of the MonthFraud SquadDoomwatchThe CaesarsThe Devil in the FogA Midsummer Night's DreamThe Revenue MenChampion HouseThirty-Minute TheatreWrite a PlayAdam Adamant Lives!The GamblersTheatre 625Love StoryThe Wednesday PlayMacbethKnock on Any DoorThe Mask of JanusFront Page Story