"Lanterns" Episode 3 reveals how John Stewart, played by Aaron Pierre, has been trained and conditioned to be Green Lantern from a young age.

'Lanterns' drops its second episode on Sunday, August 23 on HBO and HBO Max. Here's everything you need to know.

HBO's Lanterns rewrites how Green Lanterns are chosen and gives John Stewart a baffling new origin story. Episode 3 is the season's weakest yet.