A meeting in a London bus with jewel thief Lady Christina takes a turn for the worse for the Doctor when the bus takes a detour to a desert-like planet, where the deadly Swarm awaits.
as The Doctor
as Christina
as Malcolm
as Capt Magambo
as DI McMillan
as Sgt Dennison
as Angela
as Barclay
as Carmen
as Nathan
as Lou
as Sgt Ian Jenner
as Bus Driver
as Sorvin
as Praygat
