LAW & ORDER SVU Season 18 Episode 3 Photos Imposter : WALLACE LANGHAM AND CALLIE THORNE GUEST STAR — A man (Langham) tears a family apart when he uses a prominent fake identity to lure a vulnerable wife and mother into his bed. Barba (Raúl Esparza) argues that the evidence amounts to rape, but he’s faced with a powerful defense attorney (Thorne) and a skeptical judge (guest star Vincent Curatola) in court. Also starring Mariska Hargitay (Lt. Olivia Benson), Ice T (Det. Odafin Tutuola), Kelli Giddish (Det. Amanda Rollins) and Peter Scanavino (Det. Sonny Carisi). Also guest starring Paula Marshall (Laura Collett), Chris Henry Coffey (James Collett) and Conor Proft (Justin Collett).