Where We Left Off: In danger of renaming this show 'NCIS: Prague.' Realizing that Hetty is mixed up in some heavy Romanian gang action, Callan and his fellow naval criminal investigators turned in their badges (for some reason) at the end of Season 2 and decamped to Prague. Can they find her before the Comescu mob family turns her into goulash? And how did all these good-looking Angelenos learn to speak the language?

What's Next: Seems we're in store for some backstory fill-in, as Callan, who's always claimed to have no family, flashes back to childhood with mama. Also, they're doing a little crossover with 'Hawaii Five-0' -- now that's what we call corporate synergy.

Season 3 premieres Tues., Sept. 20, 9PM ET on CBS