American Idol (8:00 p.m. EST, FOX)

There are only four singers left standing, and they’re ready to shine their brightest on tonight’s episode. The mentor? Jamie Foxx. The theme? Cinema music. It’s sure to be a dramatic evening.

90210 (8:00 p.m. EST, CW)

On tonight’s episode, Teddy (Trevor Donovan) goes against his father’s (Ryan O’Neal) wishes to end his relationship with Silver (Jessica Stroup). Instead, he takes their relationship to the next level. Elsewhere, Navid (Michael Steger) has a hard time dealing with the feelings he still has for Adrianna (Jessica Lowndes), who is now dating big-time music star Javier (Diego Gonzalez)…wait—when did her lesbian relationship end? I must have missed something.

Meanwhile, Ivy (Gillian Zinser) invites Dixon (Tristan Wilds) to spend the summer in Australia; Liam (Matt Lanter) gets support from Annie (Shenae Grimes) after his father (Scott Patterson) takes off; Jen (Sara Foster) puts Naomi (AnnaLynne McCord) on a budget; Jasper (Zachary Ray Sherman) comes back on the scene; and Debbie (Lori Loughlin) is angry to find out that Harry (Rob Estes) has been keeping Dixon’s gambling problem under wraps.

Lost (8:00 p.m. EST, ABC)

There are only three episodes left, and the mysteries continue to abound. On tonight’s episode, we learn more about the motives of Locke/the smoke monster (Terry O’Quinn). Also, we get to see some background about Jacob (Mark Pellegrino). We might even find out what those pesky Island rules are.

V (10:00 p.m. EST, ABC)

On tonight’s episode, Erica (Elizabeth Mitchell) searches for a scientist who is rumored to have created a weapon that worries the Visitors. Anna (Morena Baccarin) announces to the world that she and the Visitors may be leaving, and she gives Chad (Scott Wolf) a list of rumored Fifth Column members to look into.