This is how the mole sabotaged each challenge:

Challenge Piccy How The Sabotage Worked:
Episode 1

No Sabotage Noted


Episode 2

BCH - Man in the Iron Mask   Made them keep looking even thought Anderson told them Steve wasn't there.

Episode 3

Dice Game

Secretly met with the producers and talked about a discussion she had with Wendy about never shaving her head. The producers then set up the challenge so she could easily sabotage by not doing it and backing it up with she had said before.