Britain's Got Talent: ITV, 7:30pm
Nine new acts take to the Britain's Got Talent stage in the second semi-final of the week, competing for the audience's vote and a place in Sunday's grand final.
Only two acts are guaranteed to continue onto the final, for a chance of winning £250,000 and a coveted stage slot at the Royal Variety Performance. The results will come in at 9:30pm.
The Flash: Sky 1, 8pm
Season 1 of The Flash concludes with a dramatic finale tonight.
Barry has to make a life changing decision when fighting Dr Wells as the superhero's latest adventure draws to a close.
What to Read Next
Empire: E4, 9pm
In tonight's instalment of the US music industry drama, Cookie receives an anonymous gift which she suspects to be from someone who knew her in prison.
Meanwhile, Tiana ruffles some feathers when she spends the night with someone who isn't her boyfriend Hakeem.
Penny Dreadful: Sky Atlantic, 10pm
Penny Dreadful continues as Sir Ferdinand Lyle reveals the disturbingly dark history of the Verbis Diablo relics.
Elsewhere, Hecate and Ethan grow closer, and Rusk interviews the survivor from the Mariner's Inn attack.
