Featuring the Sixth Doctor and Peri, this story was scheduled to be produced in 1985 when the programme was suddenly placed on an unexpected hiatus by the BBC. It takes place in the "missing season" between Revelation of the Daleks and The Trial of a Time Lord.
Drawn into 'the nexus of the primeval cauldron of Space-Time itself,' the Doctor and Peri are somewhat surprised to find themselves at Blackpool Pleasure Beach.
Is it really just chance that has brought them to the funfair? Or is their arrival somehow connected with the sinister presence of a rather familiar Chinese Mandarin?