Unlike most Black Mirror episodes, "USS Callister" has a pretty happy ending. Robert's coworkers, led by programmer Nanette Cole (Cristin Milioti), manage to escape into the wider game of Infinity, leaving Robert to die in his own deleted universe. (Which means he dies in the real world as well.)

At the end of USS Callister, Nanette and the crew managed to escape Daly’s (Jesse Plemons) private server, leaving him alone and drifting through a pitch-black virtual cosmos while his real-life body lay limp and destined for death in his apartment.