 Like Jake Chambers, Callahan enters Mid-World after dying in his own world, although in Callahan's case the death is his own doing; he jumps from a window to escape agents of the Crimson King, then arrives at the Way Station from "The Gunslinger", shortly after Jake & Roland left it.He becomes a partial member of the ka-tet, assisting the ka-tet in the Battle against the Wolves and Susannah's rescue mission from 1999 New York, and sacrificing himself so that Jake may live in the final stand in "The Dark Tower VII" against the can-toi (low men) and vampires.For the second time, Callahan kills himself before allowing himself to fall at the hands of the vampires.