Crowley's Alpha Centauri Line Means More Than You Think

In Season 1, Episode 3 ("Hard Times"), Crowley and Aziraphale lose hope that they can avert the apocalypse. Neither of them can find Adam Young (Sam Taylor Buck), and they're running out of time to prevent him from becoming a full-blown antichrist even if they do somehow manage to locate him before the rapidly approaching deadline. In a fit of desperation, Crowley begs Aziraphale to abandon ship with him. "It's a big universe," he says. "Even if this all ends up in a puddle of burning goo, we can go off together." Despite the clear yearning etched across Aziraphale's face, the angel refuses Crowley and doubles down on his moral duties to Heaven's holy mission of global extinction.

Immediately afterward, in Season 1, Episode 4 ("Saturday Morning Funtime"), Crowley is tearing around his apartment, frantically digging through encyclopedias and maps to figure out where, if anywhere, he could go to save himself. During this existential pandemonium, the demon considers Alpha Centauri, thinking out loud that it's "always nice this time of year." But he crumples soon after as he accepts that nowhere in the physical realm will be far enough away to escape judgment day.

Fast forward to the Season 2 finale. When Crowley mentions Alpha Centauri as a possible getaway for Gabriel and Beelzebub, he specifically looks at Aziraphale while speaking the words. The angel wasn't in his flat when Crowley first brought up the triple-star system, but his expression reveals that, on some level, he understands the subtext of Crowley's offer. He understands that Crowley is imagining a different couple roaming the stars together in eternal bliss. Aziraphale isn't ignorant, he's just deeply repressed ... and he's supposed to be the elevated one. Ironic, isn't it?