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.
Length 59 minutes
David Tennant | Michelle Ryan | Lee Evans | Noma Dumezweni | Adam James | Glenn Doherty | Victoria Alcock | Daniel Kaluuya | Ellen Thomas | David Ames | Reginald Tsiboe | James Layton | Keith Parry | Paul Kasey | Ruari Mears