The very first Veto Competition of the season airs tonight. The first houseguests to be placed on SLOP for the week will be selected tonight by the current HoH. The competitors in the Power of Veto competition will be the 2 current nominees on the block who are Donny & Paola the current HoH who is Caleb and 3 other houseguests selected at random.

Gabi is excited for her first official day as Josh's new chef, but her first assignment - to prepare an elaborate Chinese dinner for Josh's visiting investors - has her questioning if she can really handle the demands of the job. Then when a valuable item goes missing, Gabi is shocked when she's accused of being the thief. And then Gabi is even more surprised when she finds out who the real culprit is.

A well known handbag designer hires Cat to locate her missing son in a case that exposes some family secrets.

First Live Performance Show: Meet the Top 20 Performers.

Spud calls Ethan and Ray in a panic. Grace fills Leni and Elliot in on what she's uncovered from Ethan. Elliot runs into problems after he arrests a man on their suspect list. Alec tries to change the terms of his arrangement with Campbell.

Charlie begins to think if she can trust Holly's instincts AFTER their investigation into a new bling ring case takes them to the hottest nightclub in town.

Elka needs Ross Barkley's endorsement for City Council so Melanie gets strong-armed into going on a date with him. Meanwhile, Joy hides her feelings for Mitch while he tries to get over Melanie.

We feel it every moment of our lives but for physicists, gravity is the longest running unsolved mystery of the universe. Why do all objects that have mass pull on one another? Cutting-edge theories are proposing unexpected answers: Gravity could be another force in disguise, a thermodynamic mirage, or even, a shadow of a hidden holographic universe. If so, the force that holds us to the surface of the earth, and holds the earth in orbit around the sun, may be a trick of the mind. We feel it, but it may not be real. Is Gravity an Illusion?.

A shakedown artist tries to make Les an offer he can't refuse, but the Golds fight back and turn the tables on the hustler. Seth and Karen feel the power of the force when a customer brings in a pair of high-end light sabers, and Ashley has her hands full with an angry customer who claims Ashley injured her. TV-14 D L.

Jeff believes that he has found his dream girl, but he becomes suspicious and wants to meet her in person.

Last semifinal fights before the big finale:
Roger Zapata faces against Dhiego Lima and Daniel Spohn fights Matt Van Buren.

During a super storm, the ladies get stuck in the house with some unwanted guests: Victoria's island boyfriend, Melanie's downer friend and Joy's mother. Elka thinks the ghost of a murdered woman has come back, seeking revenge.

Ryan and Wilfred find themselves taking sides during Kristen's custody battle.

The special guest star on tonight's episode of "The Soup" is Actress Mary Lynn Rajskub.

When the Robertsons participate in the West Monroe Fire Department pancake breakfast, the firemen invite Willie and his brothers to train with the department for the day. Meanwhile, Phil and Si accompany Miss Kay on a trip to visit a family grave, but Phil becomes uneasy when Kay begins to look at burial plots for their own final resting place.

In a Mexican-themed elimination challenge, the five remaining contests will face-off to avoid elimination. However, the power apron contestant will play a vital role on who will be staying...

Nessa Stein's whose father used to be a Zionist arms procurer as she she and her brother were growing up they saw his assassination. As an adult, she has inherited her father's company and she dramatically changes its purpose from supplying arms to laying high-spec data cabling networks between Israel and the West Bank. After being being appointed to the House of Lords it creates an international political maelstrom.

Dara O Briain and the team skilfully pass around the week's news before shooting on goal with guests Rob Beckett, Susan Calman, Hal Cruttenden and Romesh Ranganathan.

When Robin starts a smear campaign against all of the other Titans so that he can be re-elected Team Leader, Raven uses a time machine to bring a great leader from the past to teach Robin how to lead.

Princess Bubblegum must rally her forces when the Candy Kingdom is rocked by a massive assault.

Mordecai and Rigby paint a house.