Catherine Tregenna worked in science fiction.
Catherine Tregenna . She wrote the play Art and Guff , co-wrote the series Cowbois ac Injans and four episodes of the BBC 's science fiction drama Torchwood : `` Out of Time '' , `` Captain Jack Harkness '' , `` Meat '' and `` Adam '' . She played the character Kirsty McGurk , for several years , in Pobol Y Cwm and a doctor in Satellite City .