Unfortunately, we had to say goodbye to Dean Miller (played by Okieriete Onaodowan) during the Grey's Anatomy/Station 19 Nov. 2021 crossover event. It was a soul-crushing episode as fans anxiously watched, waiting to find out who wasn't going to make it. The promos for this episode promised "not everyone would survive," and they certainly delivered.

Season 4 was very emotional for Dean Miller, as it reflected the racial unrest that was brought to the surface — both on the show and in real life — after the murder of George Floyd. As a Black firefighter, Dean felt there was a unique burden placed on him to carry the entire community. This prompted him to form a non-violence intervention team called Crisis One.

Initially, it looks as though Dean might move to Oakland, Calif. in order to expand Crisis One. He even tries to get Vic (Barrett Doss) to go with him. After considering his offer, Vic says, "I don’t want you to go, but I can’t go with you." During this episode, a gas line explosion injures Vic and ultimately kills Dean. When he dies, Ben (Jason Winston George) is with him, later keeping a promise to care for Dean's daughter if anything happens to him. There was not a dry eye to be found.