In the scene where Dylan & Molly first meet Mrs Batstick, Dylan says: "this is Frau Helga. She's my German exchange student." Molly laughs next to him but the line was improvised, and the actor playing Molly is trying hard not to laugh.
In one scene, Dylan's dad (Doug Cockle) says in a gruff voice: 'no monkey business'. Doug Cockle says the line in the voice of The Witcher (from the computer game), which Doug Cockle also voices.