Plot summary
In the series finale, the police station is under grenade and gun attacks by Marcel Hollis's crew, and he escapes from custody. The building is evacuated, with Monroe and Cruz inadvertently left behind upstairs, trapped by rubble and fire. Carlos proposes to Holly, much to the delight of everyone present. Cruz later visits Marcel, taking Bosco with her as backup and, when Marcel refuses to turn himself in, she sets off two grenades, killing herself, Marcel and his entire gang. Before her death, Cruz kisses Bosco. Carlos seeks advice from Doc on how to be happy with Holly, and his former mentor expresses his regret at his inability to attend the wedding. The Third Watch is dismissed. The episode ends with a montage of what became of the group, accompanied with a narration from Sully.
Credits
Adapted from Wikipedia contributors, List of Third Watch episodes. HTML formatting and reference markers removed.