Bad Blood

S1 E11: Detectives Benson (Mariska Hargitay) and Stabler (Christopher Meloni) search for the killer of a young gay man whose father (guest star Jerry Lanning) heads a conservative watchdog group, but when they suspect a violent ex-convict (guest star Stephen Beach) who lives in the same building, they are in for a shock. In addition, Benson resents Munch's (Richard Belzer) attempts to help her find her father -- a stranger who raped her mother decades ago. Dann Florek, Michelle Hurd and Dean Winters also star.