The qualifying rounds begin in L.A. with ninjas from across the country taking on the world's most challenging obstacle course. Competitors as young as 15 return to take on veterans and will have a chance to face an even taller Mega Warped Wall.

As terrifying plagues descend on the detention center, Saanvi scrambles for a solution and Michaela steps up in a crisis. Cal attempts to reach Angelina.

Six self-taught baking teams arrive at the Crime Scene Kitchen to start their hunt for clues, leading them to the mystery dessert. The teams with the best crime-solving technique advance to the next week, and the duo with the poorest performance of the night heads home.

Chip is haunted by Dale's bad taste

In Summer 1999, small-town computer genius Megan resents the arrival of outgoing and mysterious foreign exchange student Isabella. Little does she know how her life will change by Summer 2000.

Abby and Daniel represent a woman whose divorce gets ugly when her ex-husband accuses her of being in a cult.

In Summer 1999, Isabella grows closer to Luke while struggling to connect with Megan. In Winter 1999, Isabella searches for justice following the disastrous Christmas party.

An article pushes girls to relive love stories and teenage pains and to rediscover their common experiences.

Viva Las Vegas! It's Labor Day weekend and everyone's letting loose for the bachelor party - perhaps a tad too loose as the excess of Sin City puts relationships to the test.

Yusuf's murder is well-received at the station. Semih thinks that this will lead them to the Hunter.

A wild weekend getaway to Båstad ends in a rude awakening for Lollo, Mia, Klara and Frida when a pair of shocking letters arrives in the mail.

Ángela makes a decision about her marriage. Visions of Inti haunt Adrián. One of Miguel's past lovers shares intimate details of their relationship.

Station Manager Yoshida decides to use seawater as a cooling source, but TOEPCO headquarters tells him to wait for authorization from the administration.

Three more contestants battle the best of the best, dueling with Nick Holloway's Nu Nu crew in a mind-blowing 3-course Pressure Test whipped up by Aru and Sunda Restaurant's gifted chef, Khahn Nguyen.

Shola's behaviour causes a panic, and Val suspects that she's hiding something from them. Meanwhile, Kelly Jo's first day out of the BU doesn't get off to the best start.