Britain's Got Talent: ITV, 7:30pm
Ant and Dec present the last semi-final as the remaining nine acts battle for a place in Sunday's grand final and the chance to win the competition.
Simon Cowell, Amanda Holden, David Walliams and Alesha Dixon judge the acts. The results follow later at 9:30pm.
Agents of SHIELD: Channel 4, 8pm
Marvel's sci-fi adventures continue tonight with tensions between the Inhumans and SHIELD.
Meanwhile, Gonzales begins to understand why Coulson was keeping secrets from him as the Theta Protocol is explained.
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Big Brother Timebomb: Live Eviction: Channel 5, 9pm
Chloe, Danny, Harriet, Kieran, Sarah and twins Amy and Sally Broadbent all face the public vote tonight after a dramatic nominations twist - and four contestants will be going home this evening.
Marcus Bentley narrates the excitement from the past 24 hours in the Big Brother house - and you'll have your first chance to meet the four new contestants setting foot inside the house for the first time tonight.
The Blacklist: Sky Living, 9pm
In the final episode of the series, Liz discovers she is being framed by Cabal and has to prove her innocence by relying on Red's connections.
Cooper hears some shocking news whilst Aram, Samar and Ressler have to work out who they should trust.
