'Last of the Titans' (1 Part) by Nicholas Briggs

Once again, the TARDIS displays its preference for the grimy, the odious and the dangerous - and, finding himself lost and alone in the dark heart of a gigantic spacecraft, the Doctor has no way of knowing that a cosmic catastrophe is waiting to happen...

Sylvester McCoy (The Doctor), Nicholas Briggs (Vilgreth), Alistair Lock (Stelpor), Lennox Greaves (Professor Patrick Trethui), Holly King (Mrs Burden)

Directed by Nicholas Briggs

Notes:
*Featuring the the Seventh Doctor

*A Big Finish Audio Production. This story was included on a free CD offered with Doctor Who Magazine #300.

*The Doctor is travelling alone, and seems more seasoned and introspective, so probably occurs just before the TV movie