Angela Bassett's "9-1-1" character Athena Grant takes an unexpected cruise aboard the Odyssey Thursday, as two Ryan Murphy-created ABC shows cross over for the first time. The no-nonsense LAPD sergeant is called in to prevent a possible robbery during the ship's Casino Week and the investigation -- which includes glamming it up in beautiful gowns -- takes longer than she expects.

Worlds collide as Angela Bassett's '9-1-1' character Athena Grant makes an unexpected appearance in the latest episode of ABC's 'Doctor Odyssey', airing Thursdays on ABC. The actress tells PEOPLE all about her experience shooting the crossover episode.