As an unknown criminal steals the priceless Spoonmaker Diamond from the Topkapi Museum, Merrill (Gavin MacLeod) informs the crew that they will be sailing on the Stella Solaris cruise ship to their next destinations: Greece and Turkey. Travel agent Dana Pierce (Polly Bergen) wants to check out the locales for business purposes. Emmett and Ella Stokes (Harvey Korman and Nancy Dussault) insist they have seen fellow passenger Mark Hayward (Mike Connors) before and they tell him so, but he repeatedly denies it. Crusading reporter Joe Novak (Kiel Martin) is quietly dating Sabrina Drake (Jan Smithers), whose mother Amanda Drake (Alexis Smith) he libeled in his columns. When Doc (Bernie Kopell) finds out that Sabrina is pregnant, he gives serious consideration to marrying Sabrina and being the unborn child's surrogate father. Photographer Cliff Jacobs (David Hedison) runs into his ex-wife Monica Brandon (Linda Evans) on board and wants her to model for him, but she won't do it until he has a...