- 1972 / 英国
- 主演：Mark Robert Helen 莱姆·多布斯 布莱恩·沃思 Helen Patrick 埃斯蒙德·奈特
- 简介：John and his class go on a school trip to the Tower of London. While he is there he loses his pet mouse and vows to return and find her later. Back in school, he is not very attentive and falls asleep during a lesson about electricity so his teacher sends