When the TARDIS lands in a dilapidated attic, the Doctor, Vicki and Steven discover they are on Earth, in London… in Number 10 Downing Street.
However alien forces are at play here, affecting the very fabric of the building… and adjusting the very essence of history itself.
Written By: Mat Coward
Directed By: Lisa Bowerman
Maureen O'Brien (Vicki), Peter Purves (Steven)
Producer David Richardson
Script Editor Jacqueline Rayner
Executive Producers Jason Haigh-Ellery and Nicholas Briggs
Doctor Who - The Companion Chronicles Previous Release
Doctor Who - The Companion Chronicles