Prison Break's Muse Watson will play a retired NCIS agent in the season finale.
Episode 3.24: Title Unknown (Part 2 of the season finale)
Airdate: May 16, 2006
04/13 - Former NCIS Special Agent Mike Franks will be played by Muse Watson (Prison Break). Source: SpoilerFix.com
04/13 - We meet Mike Franks, an ex-NCIS agent who retired to Baja beach (he's the one who recruited Gibbs into NCIS). The lady from the local bar receives a phonecall for him: it's Director Shepard. Source: SpoilerFix.com