Here are the challenges they will face from the episode description:
"Four star chefs return for the Superstar Sabotage finale, and first, one chef has to cook fish sticks in a weather chamber. Then, two chefs have to star in a giant monster movie as they make ramen. Finally, one chef has to cook a dessert with both hands behind their back"This will be the second time Fabio has competed in a Superstar Sabotage finale, while Justin Warner competed in the last Superstar Sabotage, but did not advance. Sherry and Richard are first time competitors in the Superstar Sabotage.
I will update this post with the winner once the episode airs. Update with winner after the break:
The first chef eliminated was Justin Warner, followed by Sherry Yard. This put the two Top Chef alums Fabio and Richard against each other in the finale. In the end Fabio Viviani ended up winning Cutthroat Kitchen Superstar Sabotage and won $22,000 for his charity for this round and $42,000 total.