The Doom Patrol #121

Madame Rouge plans to eliminate both the Brotherhood of Evil and the Doom Patrol. She bombs the Brotherhood's headquarters, killing the Brain and Mallah, then she attacks the Doom Patrol. They survive, but the attacks are endangering others in the city, so they move to a new base on a Caribbean island. Rouge and her ally Captain Zahl, an old enemy of the Chief's, trap them with weapons that rob them of their powers. They are given a choice: either allow themselves to be blown up, or the villains will blow up a small town in Maine. The heroes heroically choose to sacrifice themselves.