Alien Invasion (S02E11)

Dani is understudying the part of a witch in Macbeth: The Musical, which means Jack and Sam get the job of ensuring little brother Max does not cause chaos. Dani's most loyal viewers, the aliens, have got bored of never getting to meet their heroine and her pals, and have decided to teleport down to Earth, where they soon find themselves embroiled in Max's scheme to win the £10,000 reward from the UFO Society. (BBC iPlayer)