This time, it's all about fast food. Gordon invites the contenders to a high-end diner in the Cotswolds and challenges them to take over the reins. How will they deal with a busy lunchtime rush and with Gordon's attempt to order a burger from the drive-thru?Next, Gordon wants the teams to create an online delivery service. Unbeknownst to them, as well as challenging them to feed hungry office workers nearby, Gordon has invited Will Shu, founder of Deliveroo, and the heads of high street fast food chains Wahaca and Wagamama to lunch, and they have decided to order online. Will the secret panel of industry giants give their orders a thumbs up, or will it be a one-star review?Finally, the teams come face-to-face with Gordon to unpick their fast food performance this week. Who will survive their one-on-one, and who will be sent packing?