Holmes and Watson travel to London to help track down an old mentor and investigate an unsolved mystery. Meanwhile, Mycroft Holmes, Sherlock's estranged brother, reunites with Sherlock and reveals some secrets of his own.

The members of New Directions are back in action and take on their biggest assignment yet: the Beatles! As Will enlists the kids to pay homage to the classic song catalog from the Fab Four, Blaine and Kurt attempt to answer questions about their future together. Meanwhile, Rachel's New York ambitions take an unexpected turn.

The Grey Sloan Memorial Hospital doctors are faced with the devastation left by the storm. A giant mudslide in Seattle injures a group of first responders and citizens, causing the already short handed ER to spring into action. Meanwhile, Meredith is faced with a tough decision that will affect the life of a loved one, Callie is rocked by the reality of Arizona’s infidelity, and Richard’s life is in extreme danger.

The staff continue to assist those affected by the storm. Meanwhile, Callie makes a bold decision regarding her relationship with Arizona, and tragic news brings the doctors together.

Musician and humanitarian Bono; from "CBGB" and "The Big Bang Theory", actor Johnny Galecki; musical guests Kings of Leon.

Dara O Briain and the team look back over another week's events with guests Rob Beckett, Romesh Ranganathan, Josh Widdicombe and Gary Delaney.

The new Braverman baby causes a stir; Kristina takes on another kind of fight; Joel and Julia face challenges; Hank returns; Amber's boyfriend returns home.

Leslie wins an award from an international Women in Government organization, and travels to London with Ben, Andy, April, and Ron to accept it. Tom hunts down the mysterious businessman who is trying to put Rent-a-Swag out of business, while Ann and Chris settle into the next phase of their relationship.

Leslie wins an award from an international Women in Government organization, and travels to London with Ben, Andy, April, and Ron to accept it. Tom hunts down the mysterious businessman who is trying to put Rent-a-Swag out of business, while Ann and Chris settle into the next phase of their relationship.

Thomas Shelby plans to go to Cheltenham races in order to get closer to Billy Kimber. Knowing the gangster's appetite for beautiful women, Thomas invites Grace to accompany him. Meanwhile some IRA sympathisers approach Thomas with an offer to buy the stolen guns.

In the first part of the one-hour seventh season premiere, Sheldon and Penny bond in Leonard's absence, but it's Sheldon's feelings that are crushed when Leonard returns from the North Sea. Guest star Regina King returns as Mrs. Davis, the University's Director of Employee Relations.

On the second part of the one-hour seventh season premiere, Raj gets consoled about his ex-girlfriend and Howard's relationship with his mother causes an unusual threat to his masculinity. Kevin Sussman returns as Stuart, the comic book store owner.

Americone Dream is made with meth, CNN's "Crossfire" encourages incoherent yelling, Rush Limbaugh writes for kids, and Chris Fischer talks about his nonprofit, OCEARCH.

From "Don Jon", actor and director Joseph Gordon-Levitt; from "When Calls the Heart", actress Maggie Grace.