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
as The Doctor
Jacqueline Hill
as Barbara Wright
William Russell
as Ian Chesterton
Maureen O'Brien
as Vicki
Peter Sanders
as Sita
Peter Craze
as Dako
Bill Starkey
as Third Xeron / Xeron
Richard Shaw
as Lobos
Jeremy Bulloch
as Tor
Salvin Stewart
as Morok Messenger / Morok Guard
Peter Diamond
as Morok Technician / Morok Guard
Lawrence Dean
as Morok Guard
