Kathrine plays the long game

Kathrine initially asks Mark to tickle her neck and behind her ear.

He makes childlike tickling noises while he does this, which just makes her laugh.

She then rolls up a tissue and shoves it up her nostril, but immediately declares that doing so does not give her chills.

She then asks Mark to tickle her again, but this time on her elbows.

Eventually, she also has him tickle her with a peacock feather.

When Mark is unable to give her goosebumps, Kathrine tries instead to tickle herself.

Finally, she sources a head massager from somewhere, and has Mark give her a head massage.

After combining several of her methods together with no success, Kathrine finally admits defeat.

However, in the studio, Mark reveals that Kathrine never actually gave up on the task, and texted him a photo of her goosebump-y arm (recognisable from her distinct tattoos) a few days later.

Kathrine therefore earns fourth place.

(Written by Jenny R and proofread by Karl Craven)