TLC TV Guide

Raj is asked to create a message on the off-chance a Nasa mission discovers alien life, and the guys fight over what he should do. Penny contemplates a return to acting. Comedy, starring Johnny Galecki, Jim Parsons, Kaley Cuoco and Kunal Nayyar

Howard questions his engineering abilities when he and Sheldon can't get a toy drone to fly. A cancelled flight almost stops Leonard from giving the commencement address at his former high school, while Raj pits his parents against each other when his father cuts him off financially

There is a clash of personalities when Sheldon and Leonard's mothers finally meet, while Howard finally decides to do his fair share of the housework - but not without a little help from his friends. Guest starring Christine Baranski and Laurie Metcalf

Sheldon presses Leonard and Penny to choose a date for their wedding, while he also has to deal with dramatic changes in his own relationship with Amy. Comedy, starring Johnny Galecki, Jim Parsons and Kaley Cuoco

Penny struggles with Leonard's confession that he kissed another woman when he was away on his North Sea research expedition. After driving all the way to Las Vegas, she must now decide whether she wants to go through with the wedding. Back home, Sheldon doesn't know how to act after Amy tells him she wants them to take a relationship break

Leonard meets up with the woman he kissed during his trip in the hope of setting Penny's mind at ease, while Sheldon films a special episode of Fun with Flags after his break-up with Amy. Bernadette feels guilty about keeping a secret from Penny

In the satirical panel show with a standup twist, Dara Ó Briain hosts as two teams of top comedians battle to poke fun at the week's news.

A weekend in Spain's legendary party town. Roisin Conaty and Sara Pascoe join a hen party, eat a roast in the sun and - of course - visit a torture museum.

Ruben is a personal trainer whose head growth has prevented him from seeing clients. Kaitlin has blue marks and scars due to long-term drug use