Richard Schiff as Harper Dearing on NCIS.

The gang celebrates Palmer's bachelor party in the second to last episode of NCIS' ninth season. "Up in Smoke" airs May 8, 2012.

A scene from Jimmy Palmer's bachelor party in the penultimate episode of NCIS' ninth season. "Up in Smoke" airs May 8, 2012.

Gibbs (Mark Harmon) and Dr. Ryan (Jamie Lee Curtis) in "Up in Smoke" airing May 8, 2012 on CBS.

Pauley Perrette as Abby Scuito, dressed even more outrageously than usual, in the penultimate episode of NCIS' ninth season. "Up in Smoke" airs May 8, 2012.

Abby gets her party gear on in the second to last episode of NCIS' ninth season. "Up in Smoke" airs May 8, 2012.

Ducky, Abby and Gibbs in the penultimate episode of NCIS' ninth season. "Up in Smoke" airs May 8, 2012.

Brian Dietzen as Jimmy Palmer on NCIS. His bachelor party is this week!

Gibbs (Mark Harmon) and Ducky (David McCallum) on the May 8, 2012 episode of NCIS, "Up in Smoke."