猫变老鼠主演:Lillian Randolph,平凡的一天,房间内再次爆发大战。伴随着女主人撕心裂肺的尖叫声,汤姆和杰瑞的追逐战持续上演。混乱之中,女主人的夺命扫帚打中了汤姆的脑袋。也许是用力过猛,汤姆的大脑发生剧烈的变化。他表现得像一只老鼠,顽皮地追逐着恐慌的女主人,又从冰箱里掏出一大块奶酪和杰瑞一起分享。甚至他还将肥胖的身躯挤进了老鼠洞,毫不见外地躺在杰瑞的床上。小床那里禁得住汤姆的身躯,理所当然被压得粉碎。 虽然解决了天敌的侵扰,可是杰瑞非常懊恼,因为汤姆完全侵占了他的空间。杰瑞转而向书本求助,发现汤姆可能因为剧烈撞击患了失忆症,于是他打算用相同的办法帮汤姆找回真正的自己…… Tom's chasing Jerry around Mammy the maid, when she accidentally clobbers Tom with her broom. This makes Tom think he's a mouse, including crowding into Jerry's hole and eating cheese. Neither Jerry nor Mammy are happy about Tom's amnesia. Jerry tries to hit Tom again to change him back, but seems to have lost his aim (even a piano misses). A bowling ball does catapult Tom into the ceiling and change him back, but then on the rebound, he gets hit again and changes into a mouse again. Finally, a Rube Goldberg sequence triggered by Jerry's carelessly tossed bit of cheese drops an ironing board on Tom's head. Success! Except that Mammy, who's reached the same conclusion as Jerry, happens along with a baseball bat and changes Tom back into a mouse.