The English-language version featured the voices of Kevin Whately (Dr. Matthews), Sally Ann Marsh (nurse Kitty), Celia Imrie (surgeon Sally), Paul Shane (the two Teds), Brian Murphy (Dr. Atticus), Julie Higginson (Clare the lab rat) and Jonathan Kydd (Arthur the lab rat).
The English-language version had Kevin Whately (Dr. Matthews), Sally Ann Marsh (nurse Kitty), Celia Imrie (surgeon Sally), Paul Shane for the two Teds, Brian Murphy (Dr. Atticus), Julie Higginson (Clare the lab rat) and Jonathan Kydd (Arthur the lab rat).