Moomin and his friends have fun playing pranks with a hand-mirror. On Snufkin's urging, they decide to hold it up to the giant mirror in Moomin's attic, but Moominpappa warns them that there is something far more insidious and even dangerous about this mirror...
Chief Director (チーフディレクター): Rintarō (りんたろう)
Director (演出): Kazunori Tanahashi (棚橋一徳)
Screenplay (脚本): Eiichi Taji (多地映一)
Animation Director (作画監督): Toyoo Ashida (芦田豊雄)
Key Animation (原画): Takao Ogawa (小川隆雄), Ikuo Fudanoki (札木幾夫), Masakazu Higuchi (樋口雅一)
Lead Inbetweener (動画): Katsuo Takasaki (高崎勝夫)
Art Director (美術監督): Katsumi Handō (半藤克美)
Backgrounds (背景): Naoshi Yokose (横瀬直士)
Audio Director (音響監督): Atsumi Tashiro (田代敦巳)
Music (音楽): Seiichirō Uno (宇野誠一郎)
Starring Kyōko Kishida as Moomin (ムーミンの声：岸田今日子)
Production (制作): Mushi Production (虫プロダクション)
Broadcast date (放送日): 26 March 1972 (1972年3月26日)