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.
The Doctor
Christina
Malcolm
Capt Magambo
DI McMillan
Sgt Dennison
Angela
Barclay
Carmen
Nathan
Lou
Sgt Ian Jenner
Bus Driver
Sorvin
Praygat
