Andy loses his voice, throwing the day's gig into jeopardy. However, the most unexpected person steps forward to take Andy's place, causing havoc as the band race to get there.

Danny needs a cake for his parents' wedding, and fast! The band deliver a cake, but Mac's size-shifting machine causes chaos, and they have an angry wedding organiser to contend with.

Rockers Leo and Jimi are unfairly locked in detention by their strict headteacher and will miss their first ever gig unless the band can bust them out. It's time for a crazy plan!