On This Day (USA) - 7 December

An Unearthly Child: The Forest of Fear premiered on BBC One in 1963 at 5:15pm GMT, watched by 6.90 million viewers.

The Invasion: Episode Six premiered on BBC One in 1968 at 5:15pm BST, watched by 6.50 million viewers.

Zoe, Jamie and Isobel confront the Cybermen advancing on them from all sides in the sewers beneath London.

The Doctor hurries to devise a protection from the Cybermen's hypnotic signal, as they set their sights on a paralysed London.

Dragonfire: Part Three premiered on BBC One in 1987 at 7:35pm GMT, watched by 4.70 million viewers.

Silver Nemesis: Part Three premiered on BBC One in 1988 at 7:34pm GMT, watched by 5.20 million viewers.

Damian Samuels will be 50 - credited as Arthur Lloyd in The Empty Child / The Doctor Dances

Damian Samuelsis an English film and television actor.

He is most recognisable from his role as the invited band manager and selected victim in the infamous award winning music video of the single "Where's Your Head At?" by Basement Jaxx, directed by Traktor, and Mr. Lloyd in Doctor Who in the episodes "The Empty Child" and "The Doctor Dances".

More recent credits include EastEnders and White Lightnin' starring Carrie Fisher, released in 2009.

C Thomas Howell will be 56 - credited as The Gentleman in Escape to L.A.(TW)

C Thomas Howell  is an American actor and film director. He starred in the films The Outsiders as Ponyboy Curtis and in The Hitcher as Jim Halsey. He has appeared in The Da Vinci TreasureSoul ManRed DawnSecret AdmirerGettysburgH. G. Wells' War of the WorldsThe Day the Earth Stopped and Gods and Generals

Wendy Padbury will be 75 - 34 credits, including Zoe in The Wheel In Space

Wendy Padbury is a British actress from Warwickshire, England, best know for playing Zoe alongside Second Doctor Patrick Troughton.

Padbury came to prominence in 1966 when she joined the cast of the long-running ATV soap opera Crossroads after she came second in the television talent contest "Search For A Star". She played the role of Stephanie "Stevie" Harris, foster daughter to the show's main character, Meg Mortimer (Noele Gordon).

She was cast as the Second Doctor's new companion, Zoe Heriot, in Doctor Who in 1968. She became very close to her co-stars Frazer Hines and Patrick Troughton, the latter playing the Doctor. 

Her connection with Doctor Who after she left the programme (at the same time as Hines and Troughton) was not quite over. She appeared in Doctor Who and the Daleks in the Seven Keys to Doomsday (1974), a stage play at the Adelphi Theatre London based on the television series, in which she played a companion named Jenny, opposite Trevor Martin as the Doctor. She then made a cameo appearance, again with Hines and Troughton in Doctor Who's 20th anniversary story, The Five Doctors.

Other roles include co-presenter of the second series of Score With The Scaffold. She appeared in three series of the children's television adventure programme Freewheelers playing the part of Sue Craig. In 1971 Padbury appeared in Piers Haggard's cult British horror film Blood on Satan's Claw as the unfortunate Cathy Vespers. 

She later became a theatrical agent with Nicholas Courtney, Colin Baker and Mark Strickson, all former Doctor Who actors, amongst her clients. She discovered Matt Smith at the National Youth Theatre.

Padbury was for a time married to Melvyn Hayes

Rosalind Ayres will be 76 - 2 credits, including Mrs Wintergreen in The House of the Dead(TW)

Rosalind Ayres (born in BirminghamWarwickshire) is an English actress, Ayres is well known for her role in the 1997 film Titanic, in which she played Lucy, Lady Duff-Gordon.

Ayres has appeared in numerous films and television series, including regular performances in Armchair Thriller, Penmarric, Play for TodayThe Bounder, Father's Day and Trevor's World of Sport. She has acted in and directed numerous audio plays for L.A. Theatre Works and Hollywood Theater of the Ear.

Ayres appeared on the BBC One semi-improvised sitcom Outnumbered as Gran.

Peter Brayham (died 2006 aged 70) - 3 credits, including Stunt coordinator for New Earth

Stunt coordinator for The Christmas Invasion; New Earth; School Reunion.

Also worked on Life on MarsFoyle's WarSilent WitnessThe Kindness of StrangersHustleJudge John DeedJerichoFestivalShoebox ZooRose and MaloneyCutting ItMurder CityEngland ExpectsWinter SolsticeThe RoyalTrial & RetributionThe PlanmanThe CommanderState of MindMy Uncle Silas IIMy Uncle SilasBaitStill GameAl's LadsParadise HeightsThe BillFootballers' WivesNight FlightSentinels of DarknessLinda GreenLargeVacuuming Completely Nude in ParadiseTake MeHigh Heels and Low LifesBridget Jones's DiaryIntimacyMind GamesComplicityCircusGrange HillCI5: The New ProfessionalsDoomwatch: Winter AngelWhatever Happened to Harold Smith?DangerfieldSmack the PonyPeak PracticeFar from the Madding CrowdThe Ebb-TideSpice WorldA Dance to the Music of TimeBring Me the Head of Mavis DavisTwin TownIndian SummerPrime Suspect 5: Errors of JudgementThe Leading ManCrimetimeWhen Saturday ComesThe Near RoomA Mind to MurderCrackerSeaforthFinneyGrushkoEarthfastsSoldier SoldierThe HawkBody & SoulLovejoyFrankensteinRuth Rendell MysteriesUnderbellyBoonScreen OnePrime SuspectMedicsLife Is SweetJekyll & HydeTank MallingSaracenChildren's WardMy Left FootThe Lion, the Witch, & the Wardrobe