The Armageddon Factor

(Series 16, Episodes 21-26)

Summary: The Marshal is nuts, Crusty McCrustyface is working for the Black Guardian (who is actually the White Guardian…or both?!) and, really, who the hell is Drax?  The Doctor puts his TARDIS on shuffle and re-hides all the bits of key they’ve spent 26 episodes assembling.  Adieu Romana I - seems like you might get some inspiration for your next face from Princess Astra.  (Top tip: when you’ve got too many subplots, you can always trap one in a time loop.)

Watch it because: A sense of completion.

Original Air Date: 20 January – 24 February 1979.

Doctor: Tom Baker.

Companions: Romana (Mary Tamm) & K9 Mk II (John Leeson).

Writer: Bob Baker & Dave Martin.

Director: Michael Hayes.

Producer: Graham Williams.