A shot outside the Raven with two extras, a bald smoker and a long-haired person opening the door to club and going in, was recycled from Season 2, Episode 4, Bad Blood. That same scene was also used as opening shot for Season 2, Episode 22, Curiouser and Curiouser.
Although mentioned, Detective Schanke and Captain Cohen, are not seen except in pictures. They would not be in this season of the show.
The flashbacks take place aboard the R.M.S. Titanic.
Tamara Gorski appeared in an episode of Angel called Eternity, playing another young woman who tries to get the title character to turn her into a vampire.