After explaining how he couldn't reveal any GoT spoilers about the final season, he fielded a question from Emilia Clarke, who once again asked Harington what happens in the final season.
"Wait, you're in the show, you know already," Harington said.
"Yeah, but I forgot," Clarke said with a shrug. "I spent my time dealing with a dragon, which was just a tennis ball on a stick."
The actress also recalled the pair's steamy love scene, asking, "Remember in season 6, when we had sex? Did you know they filmed that?!"
After taking similar questions about GoT spoilers from John Bradley -- who plays Samwell Tarley on the HBO drama -- and Pete Davidson playing the undead Night King, Harington called on Rose Leslie, who starred as Ygritte and is Harington's real-life wife.
"My question is, what are we going to do for money now? We didn't save anything!" Leslie said, "You kept saying, 'I'm the King of the North! We can order UberEats every night!'"
Proposing a follow-up, Leslie asked, "Also, how soon can you grow back that beard?"
Given Game of Thrones' immense popularity, it was inevitable that a monologue wouldn't be enough when it came to lampooning the series, and fans got a look at some of the planned spin-offs HBO has in the works for after the show comes to an end.
In the fake promo, we got a look at Castle Black, a Riverdale-style romance drama set in the GoT universe, as well as the animated adult comedy Arya, modeled after the angsty MTV comedy Daria, and the children's show on HBO Kids called Dire Guys, a Paw Patrol knock-off starring the beloved dire wolves.
Finally, we got a look at GOT:SVU, which featured unexpected cameos from Mariska Hargitay and Ice-T in Game of Thrones-era garb while investigating a brutal murder in a castle.