The Doctor and Mel go for a holiday trip to Shangri-La aboard a Nostalgia Tours bus, only to get dragged into the battle against genocide of their fellow passenger Delta, a Chimeron Queen fleeing from the Bannermen who wish to make her species extinct.
Sylvester McCoy
The Doctor
Bonnie Langford
Mel Bush
Don Henderson
Gavrok
Belinda Mayne
Delta
Stubby Kaye
Weismuller
Morgan Deare
Hawk
Ken Dodd
Tollmaster
Richard Davies
Burton
