In “Lanterns,” John Stewart investigates Hal Jordan’s death and enters a portal in Hal’s storage unit to a planet where gas drove residents to kill one another and themselves. Hal’s digital Sentry reveals his father’s depression; Sinestro appears there.
Hal’s father gave him a key to the family “failsafe,” inherited from Hal’s grandfather. Hal later found photos, cash and a note revealing that Martin had suffered from depression and concealed his pain. The Sentry says the pain had passed through generations; the episode raises suicide as a possibility but does not resolve how Hal died.
John links the planet to Antaan, who had told him gas drove its inhabitants to kill one another and themselves. The Sentry identifies remnants of the gas in rain clouds as John begins hallucinating. At the end, Sinestro, stranded on the planet, threatens the digital Sentry.
