On the planet Xeros, the TARDIS crew discover their own future selves frozen in time as exhibits in a galactic museum and must avert this potential future.
William Hartnell
The Doctor
Jacqueline Hill
Barbara Wright
William Russell
Ian Chesterton
Maureen O'Brien
Vicki
Peter Sanders
Sita
Peter Craze
Dako
Bill Starkey
Third Xeron / Xeron
Richard Shaw
Lobos
