With his sights set on the Tony, Tom pulls out all the stops at a Houston & Levitt tribute night, but can Julia turn away from 'Hit List' long enough to help? Ivy is afraid of damaging her reputation when Tom asks her to perform a risqué number. The cast of 'Hit List' is rocked by a betrayal close to home.

With Paul missing, Sarah is forced to confront the conspiracy head on. But when Paul learns Sarah has kept essential information from him, the fragile trust between them threatens to shatter. Meanwhile, Cosima grows closer to Delphine and the dangerously fascinating Dr. Leekie.

It's one small step for man, and one incredible show about life, the universe, and everything NASA nerds want to know about.

Tonight's show is, you know, no big deal. It only features legendary astronaut Buzz Aldrin, one of 12 human beings to have ever walked on the moon! We've also got NASA's latest superstar, Bobak Ferdowsi joining us to talk about launching an SUV size probe onto Mars.

Matt and Jonah hit the streets of L.A. with an exclusive 'space tour' and Chris and the gang plays 'It Is Rocket Science' with our guests. Come blast off with us!

Kristen Wiig hosts. Music guest: Vampire Weekend

Sarah's annoyance at the invasion of her privacy turns to anger when she's questioned by Jack about the discovery that Sarah is not her real name. She refuses to answer his questions, unwilling to be drawn into a defence of her character when she's the one who has had her privacy invaded. When Jack persists in demanding an explanation, Sarah does the one thing he never would have expected... she quits.

The battle round begins with team members battling it out in duets. After each duet has been performed a decision has to be made who will make it through to the live finals. In a dramatic new twist for this year, the coaches can pinch a losing artist for their own team.

A lice outbreak at school means Rallo must lop off his beloved Afro, and when the other kids start making fun of him, Junior has his back. Meanwhile, Cleveland house-sits at Freight Train and Cookie's, where things take a bad turn after his pals show up.

Cleveland and his mother Cookie get mistaken for a married couple when they're invited to a party at a retirement community.

Meanwhile, Rallo steals a candy bar from a park vendor, but lies so Junior takes the fall.