Undercover Boss (8pm, CBS) - Moe's Southwest Grill president Paul Damico gets a big old "Welcome to Moe's!" when he goes undercover at his company.
Fringe (8pm, Fox) - In the two-hour series finale, a dangerous mission for Olivia precedes the Fringe team's final battle against the Observers, with the fate of mankind at stake. Will Walter sacrifice himself to save the world? Will Peter and Olivia be reunited with their daughter? I hear hankies may be in order.
Nikita (8pm, CW) - Birkhoff reveals the identity of Amanda's mole to Nikita, while Michael confronts Alex about her drug use.
Great Performances at the Met: L'Elisir d'Amore (9pm, UNC-TV) - Season 7 opens with Gaetano Donizetti's comic opera "L'Elisir d'Amore," about a peasant who wins the heart of a beautiful farm owner with the help of a love potion he purchased from a quack doctor.
CSI: NY (9pm, CBS) - The CSIs investigate the link, if any, between a skyscraper with a notorious history and a masked man found dead at the bottom of it. Meanwhile, Jo runs into a stranger who has a connection to her past.
Oprah's Next Chapter (9:30pm, OWN) - The second part of OprahW Winfrey's exclusive interview with Lance Armstrong.