Doctor Who: The Time Warrior

The Doctor (Jon Pertwee, the third Doctor Who) is called by UNIT to investigate when a number of scientists go missing from a top security institute. Following the kidnappings back in time to the Middle Ages, he is unaware that investigative journalist Sarah Jane Smith has stowed aboard the TARDIS. As events unfold, the Doctor discovers a sinister alien, intent on altering the future of mankind. Watch for June Brown, now better known as Dot Cotton in EastEnders, as Sir Edward's wife Eleanor. As seen on PBS. Extras include audio commentary by actress Elisabeth Sladen, producer Barry Letts and script editor Terrance Dicks; Beginning the End, a 30-minute featurette about Jon Pertwee's final season; and a photo gallery.

Journalist Sarah Jane Smith is impersonating her aunt, virologist Lavinia Smith, in order to gain access to a research centre where top scientists are being held in protective custody while UNIT investigates the disappearance of a number of their colleagues. The missing scientists have been kidnapped by a Sontaran, Linx, and taken back to medieval England, where they are working under hypnosis to repair his crashed spaceship.
The Doctor follows in the TARDIS, and Sarah stows away. In return for shelter, Linx has provided a robber baron called Irongron with anachronistically advanced weapons to use in attacks on neighbouring castles.
The Doctor helps Sir Edward of Wessex to repel one such attack, then he and Sarah conspire to drug the food in Irongron's kitchens so that the weapons can be removed while the men are unconscious. Aided by one of the kidnapped scientists, Rubeish, he then sends the others back to the 20th Century using Linx's primitive time travel equipment.
Linx shoots Irongron down and gets ready to leave in his repaired ship. Hal, one of Sir Edward's archers, fires an arrow into the vulnerable probic vent at the back of his neck, killing him. The Doctor, Sarah and Hal escape just before the ship explodes, destroying the castle.

The Doctor	---	Jon Pertwee
Brigadier Lethbridge-Stewart	---	Nicholas Courtney
Sarah Jane Smith	---	Elisabeth Sladen
Bloodaxe	---	John J Carney
Edward of Wessex	---	Alan Rowe
Eleanor	---	June Brown
Eric	---	Gordon Pitt
Hal	---	Jeremy Bulloch
Irongron	---	David Daker
Linx	---	Kevin Lindsay
Meg	---	Sheila Fay
Professor Rubeish	---	Donald Pelmear
Sentry	---	Steve Brunswick

Written by Robert Holmes
Directed by Alan Bromly
Costumes by James Acheson
Film Editing by William Symon
Incidental Music by Dudley Simpson
Produced by Barry Letts
Script Editing by Terrance Dicks
Title Music by Ron Grainer and the BBC Radiophonic Workshop, arranged by Delia Derbyshire

June Brown, now better known as Dot Cotton in EastEnders, appears as Sir Edward's wife Eleanor.

The Doctor's home planet is named as Gallifrey for the first time.