Every time Lucy is called 'Mouse' by her Mum, she turns into a real mouse! What is Lucy going to do?
| Actor | Role |
|---|---|
| LLyla McLeodLucy (voice) / Mouse (voice) / Child (voice) | Lucy (voice) / Mouse (voice) / Child (voice) |
 Sinéad KeenanMum (voice) / Granny (voice) / Parent (voice) | Mum (voice) / Granny (voice) / Parent (voice) |
| MMyles McLeodParent (voice) | Parent (voice) |
| LLouis McLeodChild (voice) | Child (voice) |