While investigating a derelict music hall, Jack and Tosh find themselves transported back in time to the midst of the Cardiff Blitz in 1941. In this time period, the music hall is playing host to a group of air force pilots enjoying their final day of leave -- and much to Toshiko's astonishment, one of them is named Captain Jack Harkness. Tosh must find a way to return to the present even as her friend's secrets threaten to come to light, and a mysterious figure watches the events in both centuries.

The inspiration for Captain Jack Harkness essentially came from the idea that the only person the flirting leader of Torchwood could truly fall in love with would be himself. This notion was developed by Catherine Tregenna, who had already written Out Of Time for the programme; Tregenna was the only person, besides head writer Chris Chibnall, to contribute multiple scripts for the season. Captain Jack Harkness was directed by Ashley Way, who was already well-known to the production team, having worked in that capacity on the TARDISose preludes for the 2006 Doctor Who season, as well as the interactive Doctor Who game Attack Of The Graske. In addition, Way had previously helmed episodes of Belonging and Casualty. Captain Jack Harkness was made alongside the season finale, End Of Days.

• Forthcoming.