Hell’s Kitchen Season 8 Episode 5 (Hell’s Kitchen s08e05) with title “11 Chefs Compete” aired on Wednesday, October 6th 2010 at 08:00 pm via FOX Network.
Here is summary for Hell’s Kitchen Season 8 Episode 5 :

Challenges facing the 11 remaining chefs include devising menus for a retro-themed high-school prom (with the losing team having to set up for the prom) and preparing entrée salads (the winner is to be featured in Bon Appetit magazine).