Mae's sneaky knock-knock joke (plus socks)

Here's a brief description of the contestant's attempt. Someone's probably working writing up more detail!

Mae brought in a knock-knock joke, with parts of the punchline hidden in people's pockets: "Mae" in Greg's pocket, "Pinhead" in Kiell's pocket, and "Martin" in Ivo's pocket. They also got Alex's wife to mail them two of Alex's socks, which they were wearing in the studio. They received 4 points.

(Written by Taskmaster Wiki contributors)