House of Time / House of Creatures

Summary
The contest for School Representative is hotting up, with Mara running. Jerome asks Mara out, but gets rejected when he starts insulting Mick. The latest riddle leads Sibuna to the grandfather clock, but when they open it it's empty. Has the next puzzle piece already been taken? Alfie is still fishing around so the gang tells him he was right all along about aliens. Then, during a gang meeting, Nina opens the 5th puzzle piece and a secret message appears on the wall of the house itself. Alfie attacks Mrs Andrews, believing her to be an alien, forcing Fabian and Patricia to tell him the truth about the puzzle pieces and their quest for the treasure. Jerome is helping Mara with her election campaign, but then Mick returns, and asks Mara out. She accepts and they become an official couple. Nina goes to visit Sarah who tells her "you are me". In the attic she finds a picture of Victor, Rufus and Sarah in 1960, and only Sarah had aged.