5.03. The Paradox Planet
The TARDIS arrives in the path of an advanced war machine. But this isn't just any tank – it's a Time Tank, and it smashes through time. Welcome to a planet quite literally at war with itself...
Written By: Jonathan Morris
Directed By: Nicholas Briggs
Tom Baker (The Doctor), Lalla Ward (Romana), John Leeson (K9) Simon Rouse (Drang), Tom Chadbon (Embery), Emma Campbell-Jones (Shola)