Mel tries to convince Joe of his importance to her and the family after she learns that he has been looking for another job.

The judges continue to winnow down the competition in the final round of auditions, but the stakes are raised as the remaining hopefuls are put to the ultimate test in an intense lamb challenge. Then, the Top 19 contestants compete in their first mystery box challenge of the season and must create an exceptional dish using the most basic mystery box ingredients. Later, the contestants participate in the season's first emotional elimination round.

Ben begins to develop romantic feelings for Riley, but his reputation for being an irresponsible playboy works against him. Elsewhere, Tucker attempts to date a model and Bonnie uses Emma to get close to an attractive stranger.

After being off the market for years, Tony strikes up a romance only to have Jack discover that his is new girlfriend is two-timing him. Meanwhile, Mason is frustrated with Aunt Terry for not letting him drive, so he seeks help from Darren, and Stitch alludes to a secret crush.

At 2:50 p.m. on April 15, two bomb blasts turned the Boston Marathon finish line from a scene of triumph to tragedy, leaving three dead, hundreds injured and a city gripped by heartbreak and terror. Less than five days later, the key suspects were identified and apprehended, with one dead, the other in custody. How did investigators transform the chaos of the bombing into a coherent trail of clues, pointing to the accused killers? NOVA follows the manhunt step-by-step, examining the role modern technology - combined with old-fashioned detective work - played in cracking the case. Given hundreds of hours of surveillance and bystander videos, how did agents spot the bad guys in a sea of spectators? Why couldn't facial recognition software I.D. the criminals? How much could bomb chemistry analysis, cell phone GPS, infrared imagery and crowd sourcing reveal about the secrets behind this horrific crime? With the help of top criminal investigators and anti-terrorism experts, NOVA explores which technological innovations worked - and which didn't - in the most notorious case of today, and how the world of crime fighting could be transformed tomorrow.

On May 20, 2013, a ferocious EF5 tornado over a mile wide tore through Moore, Oklahoma, inflicting 24 deaths and obliterating entire neighborhoods. It was the third time an exceptionally violent tornado had struck the city in 14 years. Yet predicting when and where these killer storms will hit still poses a huge challenge. Why was 2011-the worst ever recorded tornado season that left 158 dead in Joplin, Missouri-followed by the quietest ever year of activity prior to the Moore disaster? Can improved radar and warning technology explain why so many fewer died in Moore than in Joplin? And will tornadoes get worse as Earth's climate heats up? In this NOVA special, we meet scientists in the front ranks of the battle to understand these extreme weather events. We also meet storm survivors whose lives have been upended and learn how we can protect ourselves and our communities for the uncertain future.

It's Round 2 of Battle of the Sexes and the MythBusters test the cliches: Will lost men really not stop and ask for directions? Are women better multi-taskers? Which sex can parallel park with aplomb? And should "throwing like a girl" really be an insult?

Toby's personal life also heats up as his relationship grows with crime reporter Tia Tremblay, who is inexplicably the one person he can't read. Life will be no less dramatic for Toby's colleagues as Sgt. Michelle McCluskey struggles through a complicated marriage with her husband, while IIB head Alvin Klein attempts to protect himself and his team from the political manoeuvrings of the ambitious new police superintendent, Nichola Martell. Meanwhile, new director of emergency services Oz Bey realizes that being the boss is harder than he expected.

The judges continue to winnow down the competition in the final round of auditions, but the stakes are raised as the remaining hopefuls are put to the ultimate test in an intense lamb challenge. Then, the Top 19 contestants compete in their first mystery box challenge of the season and must create an exceptional dish using the most basic mystery box ingredients. Later, the contestants participate in the season's first emotional elimination round

The truth behind Sam's death is revealed. Jimmy meets with the Chinese. Grace confronts Sam's killer. Campbell and Jimmy come to an agreement.

When Polly is apprehensive about putting herself up for a promotion (wine and cheese manager) and Natalie announces that she's playing a "hillside" in the school play, Elaine and Max decide to get involved in order to make sure that Natalie and Polly are living up to their full potential.

An eccentric police consultant is brought into the SBPD to interview Shawn, Gus, Lassiter and Juliet about their seemingly poor police work on a tough case they're in the middle of trying to solve.

An SVT-40 rifle, a LaRue Tactical OBR battle rifle and an M32 grenade launcher are featured in the Season 5 premiere.

Jessica and Tyler's relationship hits a snag; Marlon has a crisis of faith; Averey and Johnny's relationship takes a sour turn.

Coming Soon...

Howie Mandel, Brit Marling

The third set of semi finalists attempt to impress the judges and viewers at home. Luminites are tonight's stand out act and receive a standing ovation from all the judges. Others to impress include Nu Skool, Rosie and Joseph. After all the acts have performed the phone lines are opened for the third public vote of the series.

Ant and Dec are back with the results from tonight's public vote. Demi Lovato performs live on stage. Ant and Dec reveal that Luminites, Pre Skool and Joseph are in the top three. They then reveal that Luminites have topped the public vote and gained a place in the final. The judges are split in their decision meaning the result reverts back to the public vote. Ant and Dec then reveal that Pre Skool have gained the second available place.

Steve-O continues to bully Connor and Kevin, forcing Dynasty to make a surpring decision. Christine thinks about leaving Waterloo Road. Lula makes an unlikely friend in new science teacher, Esther Fairclough.