It's up to Mr. Merlin to save the day when Zac and Leo get swindled by a music agent.

After Zac's and Leo's friendship comes to blows over the affections of a girl, Mr. Merlin needs to smooth things over between them.

Zac's attempt at a chemistry project doesn't have quite the intended result.

Mr. Merlin scoffs at Zac's superstitions when the lad puts his faith in a lucky amulet.