HBO’s new tennis documentary 7 Days in Hell premieres on the pay network this Saturday at 11:00pm, but if you’re an HBO GO subscriber it’s your lucky day. Ahead of its television premiere, the full special is already available on the network’s streaming site. Andy Samberg and Kit Harington star, and there are tons of guest stars in store including Fred Armisen, Lena Dunham, Will Forte, Karen Gillan, Howie Mandel, June Squibb, and more. Check out the teaser below: