After some of the Legends are captured and thrown into a Russian gulag during the height of the Cold War of 1986, Snart leads the team in an elaborate escape plan to free their comrades. However, Rip gives Sara a secret side mission that could prove not only to be a liability, but fatal to the team.

As the hospital deals with Meredith's trauma, Callie and Maggie perform a risky, experimental surgery on Alex's 15-year-old patient against his professional opinion. Meanwhile, Owen and Nathan are still at odds with each other, and Maggie and Andrew's relationship continues to develop.

Idol fan favorites Constantine Maroulis, Chris Daughtry, Kellie Pickler, Jordin Sparks, David Cook, and Haley Reinhart return to mentor the contestants and perform. The judges vote on the second showcase and five contestants are sent home. Find out who advances to the Top 14 in the quest to become the final Idol.

When the gang finds out about Bernadette's pregnancy, they celebrate by singing karaoke. Also, Bernadette is concerned when Wolowitz freaks out over her pregnancy announcement, and Wolowitz is convinced he must make more money to provide for a baby.

When John starts feeling old, he attempts to make himself look younger, much to the dismay of his family. Also, Heather worries that Sophia's piano recital will be a disaster; Jen, Greg and Lark go to an over-the-top birthday party full of overachieving parents who make them panic about getting Lark into a good preschool; and Matt meets Colleen's mother, Mia, for the first time.

After Marjorie reveals her plans to get married, Christy and Bonnie want to make sure she has a really special day.

After the founder of a successful internet start-up is found dead, Red recognizes the crime scene as the work of a notorious killer. Liz and the task force work with Red to track the murderer through a dangerous underground news source. Meanwhile, Tom faces a life threatening situation, while Liz considers options for her baby.

Clarke's hope for peace are dashed by a new threat. Raven becomes a target. Meanwhile, Murphy is running a dangerous con.

A wind machine comes into play when the all-star clothiers are tasked to create elegant looks showcasing the movement of fabric.

Mellie seeks out Olivia's help but may not be prepared for what that entails, and Liz tries to convince Susan Ross to run for the presidency. Meanwhile, Abby and Cyrus are at odds when a profile piece on Fitz comes into question.

Caroline shares her riches-to-rags life story on stage at a storytelling night and captures the attention of a Hollywood studio executive. Meanwhile, Sophie and Oleg search for a surrogate.

The guys pose as employees at a copy center, conduct bizarre exit interviews for moviegoers and then lead some very peculiar protests. Later, it's Unhappy Hour for tonight's big loser, as he cuts off paying customers at a party.

Tensions in the Keating household run high, as each student struggles in their own way trying to return to normalcy. In a flashback, we'll learn new details about Annalise's past.

Gabriel Iglesias and Randy Couture battle it out.

A high speed chase traps Will, Katie, and Proxy Snyder. When all is said and done, their allegiances are tested and Will and Katie find out shocking news about their long lost son.

Wozniak grapples with his guilt over attempting to kill Saperstein as he is faced with the need to finish the job. Harlee desperately tries to protect Saperstein as she struggles to keep the unit from being torn apart by suspicion and grief. Stahl gets closer to uncovering Harlee's relationship with Miguel.

As Dale attempts to make a good deal on some furniture he leaves his daughters in Chip's care.

The chefs land in the Bay Area and prepare fresh dishes for rapper MC Hammer. Later, they cook from important and influential international food eras. Foodie Jonathan Waxman makes an appearance.

Adam, Blake and Ders attempt to become social media celebrities.

Claire is finally fed up with Doug's childish behavior and breaks up with him. They both date new people and discover surprising things about themselves.

Sherlock and Joan search for a murderer who used poisonous mushrooms to kill a botany professor and a group of the instructor's students. Also, when Joan is disturbed by loud noise next door, she discovers her neighbor, Trent, is renting out his home through a vacation site that caters to hard partiers.

Entry to Valhalla eludes Ragnar, but as he lies in his sick bed in Kattegat events unfold beyond his control. Bjorn orders the arrest of Floki for Athelstan's murder while in Paris, Rollo betrays the last of his Viking supporters to strengthen his position in the French court. In Hedeby, Kalf announces joint earldom with Lagertha, but is power sharing Kalf's true intention and is Lagertha actually willing to share what once was hers?.

Host Craig Ferguson is joined by guests Jimmy Kimmel, comedian Jen D'Angelo, and PR guru Howard Bragman as they debate and discuss history's biggest political blunder.

Host Craig Ferguson is joined by guests Chris Hardwick, comedian Jordan Carlos, and Scientist Bob Pflugfelder as they debate and discuss history's worst medical advice.

Jimmy is joined on the show by Vince Vaughn, Ryan Seacrest and Dead & Company.

Stephen welcomes actress Tea Leoni from the CBS drama series "Madam Secretary", Amanda Peet, and Triumph the Insult Comic Dog.

Seth is joined on the show by Kiefer Sutherland and Carice van Houten.

James is joined on the show by Katie Couric, Gillian Jacobs and Anders Holm.

As the final preparations are made for the Havisham wedding, Arthur and Matthew put their plan in place to stop the ceremony going ahead. While Arthur distracts Compeyson in the pub, Matthew arrives at Satis House with members of the brewery board. How will Compeyson react when he arrives? Meanwhile, Edward arranges for Sir Leicester to visit and Honoria knows she faces a difficult decision - one that affects her entire family.

Perez finds it hard to deal with what has happened to Tosh as he continues to take a look into the murders of Robbie Morton and Michael Thompson.

Behaving strangely after mysteriously going AWOL, Harry is called in to investigate the murder of a members' club owner in Shoreditch. The team have a prime suspect but Harry has his own ideas about who is responsible.

Harry determines to get his life and the store back on track, and returns to what Selfridge's does best - a classic, store-wide summer promotion. However, he still has to contend with the disruptive antics of Lord Wynnstay, while a guilt-ridden Jimmy hides behind a daring new business proposition. Despite her grief and shock, Mae's new ready-to-wear summer collection proves a runaway success as Kitty's time at Selfridge's comes to a poignant end. Drama, starring Jeremy Piven, Sacha Dhawan and Katherine Kelly.

Catherine Tate joins Adam, Josh and Alex to pick over the week's news.

Stephen is joined on the show by Sue Perkins, Sara Cox, Chris Addison and Alan Davies.

The walls close in on Reid as a secret from his past threatens to destroy his future in Whitechapel.

Highlights from the series are shown.