Little Lulu/Radar


 * "The Little Lulu Show" episode "Minibur" has one scene in which at 1:19 Wilbur is seen briefly naked when he jumps in the bushes after having his clothes ripped off by a bear.
 * This doesn't really count as Getting Crap Past the Radar; several episodes featured the male cast naked, often explicitly showing their butts much more clearly than that.