Torchwood: Iceberg

This story is set shortly after Owen joins Torchwood and sees him called to a hospital by a former colleague. Naturally, something is very wrong in the hospital, with the full details of the mystery being slowly revealed over the course of the story. The colleague is also behaving strangely, and much of the story explores her relationship with Owen, building on how he dealt with his fiancee's death and how he sees himself deep down.

Some of this foreshadows what will eventually happen to him in the TV series, although that's a fairly minor element in a creepy tale about a deathly quiet hospital night shift and a patient who seems to be hallucinating following a tragic loss. It's one of the better solo outings for Owen, drawing on his medical background rather than some of the more overt aspects of his personality more commonly in display on TV.