"Requiem for a Titan" from Teen Titans vol.1 #14 (DC, 1968) by Bob Haney and Nick Cardy
I came into contact with the original Titans strip through Showcase Presents and fell in love with it. It was even a major part of Siskoid's Blog of Geekery my first year. All that Bob Haney craziness. That beautiful Nick Cardy art. Simply loved it. It is easily my favorite iteration of the Titans, and I like how the cartoon show owed at least as much to it as it did Marv Wolfman's New TT.