Bad Birthday Party Voltron: Defender of the Universe : Season 1 Episode 12

This one starts with Princess Romelle of Pollux being tossed into a dungeon cell on Doom by Prince Lotor. Due to her resemblance to her cousin Allura, Lotor figures he might as well live vicariously through her and snag a smooch. Of course, he is seriously denied when she sends him packing with a hefty slap to the face. She even tries to stab him with a sharp rock. Poor Lotor, he gets no respect.