The Doctor has faced a whole galaxy full of formidable foes. David Tennant and a host of stars including John Barrowman, Derek Jacobi, Zoe Wannamaker, Freema Agyeman and Sarah Parish look through the greatest moments of his deadliest enemies.

A fresh look at the best bits of trainee doctor Martha Jones and her journey with the Doctor. David Tennant, Freema Agyeman and other key cast share their favourite Martha moments and give their thoughts on the highlights of travelling through time and space with the nation's favourite Time Lord.