Hal and John's upcoming HBO show may be set on Earth, but that doesn't mean some alien Lanterns won't be a part of their story.

Here’s how it works. Introduced in 1961’s Green Lantern #7, Sinestro was once a member of the Green Lantern Corps who trained Hal Jordan how to wield the emerald light of willpower.

The news was first reported by Deadline. In the comic books, Sinestro was a mentor of Hal Jordan, a Green Lantern, and had quite a manipulative nature to him. He was driven by power and greed ...

Writer John Broome and artist Gil Kane’s groundbreaking issue introduces Sinestro in what would become one of the most influential single issues in Green Lantern history. The story reveals how ...