Aliens Among Us

Aliens Among Us was the fifth series of Torchwood, released by Big Finish Productions in 2017 and 2018. The audio series served as a continuation of the Torchwood television series and previous Big Finish audio stories set after the Miracle Day - Forgotten Lives, More Than This, Ghost Mission, Made You Look and Visiting Hours, where Gwen Cooper started to rebuild Torchwood Three in Cardiff with help from Rhys Williams and Andy Davidson.

The series was created by James Goss, Scott Handcock and Russell T Davies, who introduced several new characters, including Tyler Steele, Orr and the mysterious Ng, an alien that occupied Gwen's body and posed as her. St John Colchester, who first appeared in The Torchwood Archive and likewise was created with Russell T Davies, also became one of the main characters of the series.

John Barrowman, Kai Owen and Tom Price returned to voice their characters, and Eve Myles only briefly appeared in several stories due to her unavailability for most of the recording sessions, while possessed Gwen was voiced by Alexandria Riley. The series also saw the first appearance of the parallel universe version of Yvonne Hartman and the return of Bilis Manger.

The series centred around the Sorvix occupation of Cardiff and the reactivation of the Cardiff Space-Time Rift.