John Barrowman has hinted to Doctor Who Magazine that Russell Tovey may join the Torchwood team for the fourth series.
The pair recently starred alongside each other in a small scene for the Doctor Who finale 'The End Of Time Part 2', when Captain Jack Harkness and Midshipman Alonso Frame meet for the first time.
"What I'd love, what I think would be great, is if Midshipman Frame became Jack's companion in Torchwood. He's the perfect companion for Jack.
"It'd be like Batman and Robin. Of course I'm Batman. He's Robin."