I've seen all of Torchwood (now) after watching the most recent Doctor Who series (other words not the old black and white) and the last episode of Season 4 just landed on a cliffhanger.
Rex is now immortal like Captain J. Harkness.
I would've said Captain Jack but that kind of sounds like PotC with Johnny Depp lol.
Are there any more plans (or other in-universe/spin-off series?) until David T's return and then the other new Doctor appear in ...soon?