The action partially takes place at St Teilo's Military Hospital in 1918.
The Torchwood Institute once had people called Gerald and Harriet working for them.
Gwen is menaced by a one-legged man in a hospital. Very David Lynch.
Captain Jack has sealed orders from past Torchwood employees that can only be opened at a certain critical time.
Owen discovers that he is to become a father after a fling with a lady who is out of this world. Literally.
A blank piece of paper is deployed by Captain Jack to explain how a Time shift works.
Two of the Torchwood team share an almighty - distinctly non-platonic - snog.
Toshiko wears a dress for an important day at the office - and we get to see her flat!
The final shot of the episode is unbelievably moving and brilliant.
> Click here for our review of last week's episode 'Sleeper'