On This Day (USA) - 20 December

Celebrity Eggheads: Series 3, Episode 6 premiered on BBC2 in 2010 at 6:00pm GMT, watched by 2.40 million viewers.
Can a team from Doctor Who featuring Colin Baker, Katy Manning, Frazer Hines, Louise Jameson and John Leeson triumph over the general knowledge Goliaths and win the cash prize for their charity or will it go to the Children in Need appeal?

Vastra Investigates premiered on BBC Red Button in 2012 at 7:30pm GMT

Jacqueline Pearce (died 2018 aged 74) would be 79 - 12 credits, including Chessene in The Two Doctors

Jacqueline Pearce is a British actress best know for playing Servalan in all four series of Blakes 7.

Jacqueline Pearce was born in Woking in Surrey and trained at the British stage school RADA and at Lee Strasberg's Actors Studio in Los Angeles.

Pearce starred in two Hammer horror films: The Plague of the Zombies and The Reptile. Other film roles include: White Mischief, How to Get Ahead in Advertising, Princess Caraboo and Don't Raise the Bridge, Lower the River.

In 1978 she was cast in the Terry Nation series Blakes 7 as Supreme Commander Servalan, the main villain throughout the series.  

She appeared in Doctor Who in 1985 playing Chessene, an augmented Androgum. She has more recently been associated with Doctor Who through her appearance in The Fearmonger as Sherilyn Harper, an audio drama by Big Finish Productions, and as Admiral Mettna in the webcast story Death Comes to Time.

Pearce has also made frequent guest appearances in TV series such as: Danger Man, The Avengers, Man in a Suitcase, Public Eye, Callan, Dead of Night, Special Branch, The Zoo Gang, Spy Trap and The Young Indiana Jones Chronicles.

Edward Evans (died 2001 aged 87) - credited as Ted Moss in Image of the Fendahl

Edward Evans was a British film and television actor.

During World War II, he served with the British Army in Italy and North Africa, reaching the rank of Captain.

Evans starred as Bob Grove in the popular 1950s soap opera The Grove Family, and played the role of Lionel Petty in Coronation Street during (1965-66). 

He played Ted Moss in the Doctor Who serial Image of the Fendahl.

In a long career he also appeared in Heart of the CountryThe BilShine on Harvey Moon, Suez 1956George & MildredZ CarsMr. BigOne-UpmanshipPoldarkOut of SeasonThe Gathering StormFather BrownBBC Play of the MonthCrown CourtWithin These WallsPlay for TodayWhodunnit?The Fenn Street GangComedy PlayhouseDixon of Dock GreenTill Death Us Do PartThe RegimentTales from the CryptFreewheelersSunday Bloody SundayOut of the UnknownThe Dick Emery ShowDoomwatch10 Rillington PlaceThe Main ChanceSteptoe and SonDad's ArmyConfessionOne More TimeTwo a PennyThirty-Minute TheatrePaul TempleArmchair TheatreSoftly SoftlyThe SaintTill Death Us Do PartThe Company of FiveThe Tyrant KingThe ExpertThe Revenue MenMan in a SuitcaseThe GamblersNo Hiding PlaceHancock'sThe Wednesday PlaySir Arthur Conan DoyleAdam Adamant Lives!The Troubleshooters,, CluffITV Play of the WeekPublic EyeBlind CornerGideon's WayMikeCatch HandThe VillainsCompactFirst NightThe VictoriansSuspenseThe Human JungleThe Plane MakersThe Birth of a Private ManReach for GloryThe River Flows EastGarry HallidayTwo and Two Make SixThe Winter's TaleBarbara in BlackBBC Sunday-Night PlayMaigretJacks and KnavesYou Can't WinAbout ReligionITV Television PlayhouseAlcoa Presents: One Step BeyondOn TrialDeadline MidnightThe Four Just MenThe Trials of Oscar WildeThe Men from Room 13The Vagrant HeartThe Bridal PathThe Naked LadySunday's ChildWilliam TellThe Man UpstairsDuty BoundThe Grove FamilyThe Jack Benny ProgramAssignment Foreign LegionPantomania, or Dick WhittingtonThe Angel Who Pawned Her HarpMan of the MomentIt's a Great DayEscape by NightValley of SongTurn the Key SoftlyGrand National NightDeadly NightshadeCosh BoyAppointment in LondonThe Yellow BalloonTime BombLittle Red MonkeyBBC Sunday-Night TheatreI Believe in YouThe Secret PeopleMr. Denning Drives NorthHindle WakesThe Case of Charles PeaceThe Small VoiceLondon Belongs to Me

Bill Mitchell (died 1997 aged 62) - 2 credits, including Newscaster in Frontier In Space

Bill Mitchell  played a Newscaster in the 1973 Doctor Who television story Frontier in Space.

he also voiced Zor in the 1976 Argo Records audio story Doctor Who and the Pescatons.

Also worked on Super GranRiding HighThe BitchOuter TouchUbuThe Strange Case of the End of Civilization as We Know ItThe Hanged ManThe Beast Must DieBillion Dollar BrainYou Only Live TwiceFinders KeepersMan in the MiddleThe Sentimental AgentTwo and Two Make SixNight of the EagleBBC Sunday-Night TheatreFolioA Documentary on the Making of 'Gore Vidal's Caligula'

Neville Simons (died 1987 aged 51) - 3 credits, including (extra) in The Space Pirates

Neville Simons played Frank Michaels in the Doctor Who serial The Ambassadors of Death.

Also worked on Whoops Baghdad!The Tyrant King

Walter Fitzgerald (died 1976 aged 80) - credited as Senex in The Dominators

Walter Fitzgerald was an English character actor.

Born in the Keyham district of PlymouthDevon. He married his first wife Rosalie Constance Grey in 1924. His 2nd marriage was to Angela Kirk in 1938 and they had 3 sons (Jonathan, Timothy and Charles) and 1 daughter (Julia). Toured with Sir John Martin-Harvey, Sir Seymour Hicks. He was understudy to Sir Gerald du Maurier 1928-29. Fitzgerald appeared in films from the 1930s, often in 'official' roles (policemen, doctors, lawyers). He appeared on British television in the 1950s and 1960s before his retirement. 

A former stockbroker, British actor Walter Fitzgerald was in his late 20s when he began his theatrical training at RADA. Fitzgerald made his professional stage bow in 1922 and his first film appearance in 1930. His best-remembered film roles include Simon Fury in Blanche Fury (1946), Dr. Fenton in The Fallen Idol (1948) and Squire Trelawny in Treasure Island (1950). Walter Fitzgerald made his penultimate film appearance in the opening scenes of H.M.S. Defiant (1962), as the admiral who listens to—and then disregards—ship's captain Alec Guinness' complaints about maritime cruelty.

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