"Lonely Hearts" is the second episode of season one of the television show Angel. Written by David Fury and directed by James A. Contner, it was originally broadcast on October 12, 1999 on the WB network. In "Lonely Hearts", Angel Investigations looks into a series of killings linked to a trendy L.A. singles club. While there, Angel (David Boreanaz) meets Kate Lockley (Elisabeth Röhm), an LAPD detective also tracking the serial killer - who believes, because of circumstantial evidence, that the murderer is Angel himself. After discovering the murderer is actually a body-hopping demon, Angel seeks Kate's help in tracking down the bartender, now possessed by the demon, and killing him. Kate, believing the bartender committed the murders, accepts a provisional truce with a circumspect Angel.