Crossover: Crisis on Infinite Earths

A wave of antimatter, sent by the Anti-Monitor, wipes out one universe after another. The Monitor gathers heroes from several Earths, and Kara's Earth is destroyed; Oliver dies helping the evacuation. The search for the Paragons, seven heroes who can stop the Crisis, takes the group to other Earths and other versions, like an old Bruce Wayne and Smallville's Clark. Lex Luthor steals the Book of Destiny. The Flash of Earth-90 sacrifices himself in Barry's place. Oliver returns as the Spectre and, at the dawn of time, uses his power to recreate the multiverse, dying again. Earth-1, Kara's Earth and Jefferson Pierce's Earth become one, Earth-Prime. The Paragons defeat the Anti-Monitor and honor Oliver by founding a new league of heroes.

1. CameoBatman's voice, in the flesh

   Kevin Conroy, the voice of animated Batman since the '90s, appears in live action for the first time as an old, dark Bruce Wayne of Earth-99.

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2. CameoSmallville, years later

   Tom Welling and Erica Durance return as Smallville's Clark and Lois, showing where the couple ended up after the series.

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3. CameoThe 1966 Robin

   Burt Ward, Robin on the 1960s Batman series, makes an uncredited cameo as an older Dick Grayson.

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