22. Anastasia "Dee" Dualla in Battlestar Galactica
Portrayed by: Kandyse McClure
Dies in: "Sometimes a Great Notion" (Season 4, Episode 13)
The colonial fleet of Battlestar Galactica spends four seasons hunting for Earth. That’s years of living aboard spaceships, with little rations and poor quality of life, all in the name of finding a new home. And when they find it? The planet is one big ashtray, used up and completely uninhabitable.
That’s enough to make anybody say "fuck life" but instead of ending it right away, communications officer Dee puts on a brave face, has a nice night “out” in the fleet with her estranged husband, and then, with a full smile—why does this scene feel so strange—opens her locker—wait, what is she about to do?—and blows her brains out.