05/23/2012 08:32 am ET

'Law And Order: SVU' Finale: Cassidy Returns (VIDEO)

In the "Law & Order: SVU" Season 13 finale, a familiar face returns to the squad.

Dean Winters, you may know him as Liz Lemon's ex-boyfriend Dennis Duffy on "30 Rock," returns in "Rhodium Nights" (Wed., May 23, 10 p.m. ET on NBC), the Season 13 finale as Brian Cassidy, Munch's old partner. Winters originally appeared in the first season of "SVU" before returning to HBO's "Oz." Now, one particular case brings him back.

"Cassidy, you ass!" Mariska Hargitay's Detective Benson greets her old colleague. "You punched my partner?"

"Nice to see you too, Olivia. It's been a long time," he said. "You look good."

Check out the first meeting between Benson and Cassidy in more than 10 years above and the episode's official description from NBC below.

An underage escort is found dead at a wild bachelor party, and Captain Cragen (Dann Florek) cautions his team to investigate with discretion, as there were several high-profile people at the scene. In their efforts to question a well-known leader in the New York escort world (guest star Peter Jacobson), Benson (Mariska Hargitay) and Amaro (Danny Pino) encounter former SVU detective Brian Cassidy (Winters), who's been working undercover. With his help, the detectives dig deeper into a vicious power struggle between the two top escort businesses, but before the case is cracked, a shocking event threatens to destroy the life of one SVU squad member. Also starring Ice-T (Detective Odafin Tutuola) and Kelli Giddish (Detective Amanda Rollins.)

For more on what to watch this week, check out the slideshow below:

What To Watch On TV This Week