Britain's Got Talent: ITV, 7:30pm
Another nine hopeful acts step up to compete for a place in Sunday night's grand final.
Simon Cowell, Amanda Holden, Alesha Dixon and David Walliams judge as the acts fight for the audience's vote in order to continue on in the competition. Results are announced at 9:30pm.
The Big Bang Theory: E4, 8:30pm
The Big Bang gang return for another episode of the hilarious US sitcom.
Penny seeks out Sheldon's advice about her acting career, and meanwhile the boys argue when Raj works on a project for Nasa which could involve sending messages to aliens in outer space.
What to Read Next
The Good Wife: More4, 9pm
As the newly elected State Attorney, Alicia is faced with difficult questions about her leaked e-mails during a television interview.
Diane gets into a spot of bother when she takes on a case for the firm's new right-wing client which challenges some of her strongest beliefs.
Glee: Sky1, 9pm
The US high school musical drama returns to British screens for the last time with its final season premiere.
Rachel (Lea Michelle) returns home, and soon finds an interesting opportunity awaiting her at McKinley High School.
