Tuesday’s TV highlights

SERIES

The Biggest Loser: Celebrity chef Curtis Stone drops by on a new episode of the weight-loss competition (8 p.m. NBC).

90210: The drama about overprivileged high schoolers presents its season finale (8 p.m. KTLA).

American Idol: The three remaining contestants perform songs selected by the judges as well as songs they chose for themselves in this new episode of the vocal competition (8 p.m. Fox).

Nova: The science series recalls the failure of flood control systems in New Orleans during Hurricane Katrina in this repeat installment (8 p.m. KCET).

Ancient Aliens: This new episode investigates accounts of human-alien contact in ages past (8 p.m. History).

Lost: The conflict on the island intensifies in the fantasy-drama’s penultimate episode (9 p.m. ABC).

Glee: Neil Patrick Harris (“How I Met Your Mother”) guest-stars on a new episode of the musical series (9 p.m. Fox).

Frontline: The newsmagazine examines the effects of post-traumatic stress disorder and combat injuries on U.S. service members in this new installment (9 p.m. KCET).

Real Sports With Bryant Gumbel: This new edition of the sports magazine includes a look at runners competing sans footwear (10 p.m. HBO).

Food Party: Host Thu Tran gets in touch with her inner vampire in this new episode (10 p.m. IFC).

V: The alien-invasion drama starring Morena Baccarin and Elizabeth Mitchell ends its first season (10:02 p.m. ABC).

MOVIES

One Flew Over the Cuckoo’s Nest: Jack Nicholson stars in director Milos Forman’s multi-Oscar-winning 1975 film of the Ken Kesey novel (7 p.m. TCM).

Bug: Ashley Judd and Michael Shannon come down with a case of the creepy-crawlies in this 2006 thriller (8:15 p.m. IFC).

SPORTS

Baseball: The Twins battle the Blue Jays (9:30 a.m. MLB); the Red Sox challenge the Yankees (4 p.m. MLB); the Angels visit the Rangers (5 p.m. FSN); and the Dodgers host the Astros (7 p.m. KCAL).