As soon as Tegan leaves, she rejoins the TARDIS with a new short haircut and boob tube and shorts! Nyssa leaves in Terminus, Turlough joins and the crew face off against Omega, The Mara, the Guardians, The Master and the Doctor meets his old friend Brigadier Lethbridge-Stewart. Marvellous!

But which of these stories is your favourite?

(and don't worry, I haven't forgotten The Five Doctors... that's to come later)