When the dead body that washes up on shore in New Orleans turns out to be Congressman and former NCIS agent, things get complicated on NCIS Season 11 Episode 18.

The upcoming installment will find Gibbs and his team heading south to team up with the former's ex-colleague, Special Agent Dwayne Cassius Pride (Scott Bakula) to catch the killer. 

How will Gibbs' team fit in down in The Big Easy? How much trouble can Tony get into down south? And when the FBI and a possible copy cat killer get into the mix, just how crazy will things get?

Check out these photos from a two-parter that kicks off this Tuesday and which will serve as a backdoor pilot for the NCIS spinoff:

NCIS Photos from "Crescent City"

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And if you can't get enough of Gibbs and the team, you can watch NCIS online here at TV Fanatic.

C. Orlando was a TV Fanatic Staff Writer. Follow her on Twitter.