This five-part series explores the HIV epidemic in London in the 1980s. Following the lives of a group of young gay men, the show stars Years and Years frontman Olly Alexander alongside Stephen Fry and Neil Patrick-Harris.
In a statement on the show, Channel 4 said that "it's the story of their friends, lovers and families too. Together they will endure the horror of the epidemic, the pain of rejection and the prejudices that gay men faced throughout the decade."
It's A Sin is available to watch on All 4 now. Binged the show and need a recap? Have a read of our refresher here.