New Amsterdam @ 9pm
If Sara really is "the one" for John, one would think the familiar insouciance about his mortality will wane as he recovers from his most recent life-threatening wound. But could he be wrong about her? In tonight's season finale, John begins to have doubts about that very thing, when the investigation of a presumed drowning takes him back to his days as a grifter in the 1920s. With any luck, this show will be renewed, if for no other reason than we've still got so much to learn about his previous "lives."
Greek @ 8pm
Ever since Evan dropped a dime on the Kappa Tau-Zeta Beta Prohibition party a few weeks ago, the rivalry between the Kappas and the Omegas has intensified. So one thing has led to another, and soon a few harmless pranks turn into the mother of all interfraternity battles. But besides pride, the No. 1 casualty could be Rusty and Calvin's friendship. Speaking of pride, Casey might have to swallow hers to rid the Zetas of Lizzi's annoying oversight once and for all.
Rules of Engagement @ 9:30pm
Adam and Jennifer take a big step in their friendship with Jeff and Audrey — a vacation together. Unfortunately, it also means that they've got to sit through one of those time-share sales pitches, which would be OK if that was the only hidden-agenda aspect of the getaway. But... it seems there was another reason why Adam and Jennifer were invited.
Can You Duet @ 10:30pm
Brooks and Dunn, Big and Rich, Montgomery Gentry... who'll be in line to follow them as the next great country-music duo? Well, possibly the winners of this talent contest. Country duos perform and compete for a record deal and a chance at stardom. Who's keeping score? The judges are Naomi Judd, vocal coach Brett Manning and singer-songwriter Aimee Mayo, and Rossi Morreale is the host.