 In the episode "Comet!", there is a scene that is now edited in the reruns:  The dad plays golf and keeps missing the ball while hollering "Two!" When he  finally hits the ball (and it ends up at the planetarium), the dad hollers,  "Ohhhhhhhhh, damn it! Two!" (though the closed captioning has him saying,  "Ohhhhhhhhhh, divot!"). When CN censors found out about this, they simply  deleted the word (so now the dad hollers, "Ohhhhhhhh [mute], Two!"