When a London bus takes a detour to an alien world, The Doctor must join forces with the extraordinary Lady Christina. But the mysterious planet holds terrifying secrets, hidden in the sand.
And time is running out, as the deadly Swarm gets closer…
NOTES
The Tenth Doctor ponders why people on buses are always suspicious of him – a reference to Midnight.
When Malcolm first talks with the Tenth Doctor he claims to have read all of his UNIT files. The Doctor asks him which he likes best, suggesting the ‘Giant Robot’ (Robot).
Magambo is delighted when the swarm are brought down by UNIT’s weaponry. Her line “Guns that work!” is a reference to various comments made by the Brigadier about the ineffective nature of human weaponry against alien species.
The bus in this episode is called the 200, a reference to ‘Planet of the Dead’ being viewed by some to be the 200th Doctor Who Television story. This calculation involves discounting the unfinished Shada, the Children In Need Special, Time Crash (also for Children in Need), Attack of the Graske (an interactive episode), The Infinite Quest (an animated serial) and Music of the Spheres (a BBC Proms special). It also interprets Trial of a Time Lord as a single story.
The Tenth Doctor talks of losing his companions, echoing his comments at the end of The Next Doctor. It was in Journey’s End that he was left alone when all of his friends returned to their own lives/were forced to leave his company.
Carmen’s warning that The Doctor’s ‘song is ending’ is an echo of Ood Sigma’s comments at the end of Planet of the Ood. This and the remainderof Carmen’s prophecy will be played out in David Tennant’s final three episodes as the incumbent Doctor – beginning with Waters of Mars.
