The 5th, 6th and 7th Doctors meet for the first time.
8th Doctor returns for the first time since the TV Movie.
Tom Baker returns to Doctor Who.
The Genesis of the Cybermen.
The Sontarans face the 5th Doctor for the first time.
The 7th Doctor and Ace face off against an old enemy.
The 8th Doctor encounters the Wirrn.
The Rani returns and the 6th Doctor needs to stop her.
The Brigadier teams up with the 6th Doctor.