Jamie tries to evade Yeti in the tunnels of the London Underground. Meanwhile, The Doctor and Victoria meet a potential new ally - Colonel Lethbridge-Stewart.
Patrick Troughton
as The Doctor (voice)
Frazer Hines
as Jamie McCrimmon (voice)
Deborah Watling
as Victoria Waterfield (voice)
Nicholas Courtney
as Colonel Lethbridge-Stewart (voice)
Jack Watling
as Professor Travers (voice)
Tina Packer
as Anne Travers (voice)
