 Kai Owen describes Thomas , Morgan and Hughes collectively with Robin Griffith ( Barry Williams ) as a " good old @-@ fashioned Welsh cast who know what it 's all about " . Jonathan Lewis Owen was cast as Rhys ' best man " Banana Boat " a character referred to sporadically since Torchwood 's first series premiere " Everything Changes " ( 2006 ) . In keeping with the character 's name he was given a pair of banana patterned cuff links to compliment his costume . As a joke , Eve Myles ( who Jonathan Owen had previously worked with in other projects ) left a banana skin on his car on his first day of filming . <unk> Brown played " Carrie " , the original human form of the mother Nostrovite . To transform her into the alien creature the actress was required to spend approximately an hour having make @-@ up applied . Brown was surprised at the efficiency of the make @-@ up artists as she had expected the transformation process to take longer . Originally , the human versions of the Nostrovite <unk> were intended to be more monstrous but Davies felt it was important that the audience would still be able to recognise the actor underneath once the make up had been applied . 
