The guest-starring list for NCIS' 150th episode continues to expand.

Weeks ago, Robert Wagner was announced in the key role of Tony's father. Then, yesterday, it was revealed that Penny Johnson Jerald would reprise her role as State Department Official Joanne Torrence.

On the January 12 installment, "Flesh and Bone," the team looks into an assassination plot against a prince; a link to Wagner's DiNozzo will be discovered and Gibbs will wonder if Tony can remain impartial or not.

Now, TV Guide Magazine reports that the prince is enrolled in a U.S. military flight training program led Lt. Cmdr. Rob Clarke. This character will be played by Joe Lando, best known for his 1993-1998 run on Dr. Quinn, Medicine Woman.

He hasn't really been heard from since, having last appeared on a couple TV movies in 2006.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.