Page "Iris Wildthyme" Paragraph 3

Iris's first Doctor Who-connected appearance is in the short story Old Flames, where she meets the Fourth Doctor and Sarah.

The Doctor already knows Iris as an " old friend ", and she is seen to be travelling in a 20th century London Routemaster double-decker bus ( the No. 22 to Putney Common ), which is, in reality, her TARDIS.