Alexis Conran investigates how fast food restaurants keep us coming back for more - and what we can do to get more for our money.

Alexis Conran investigates how fast food restaurants keep us coming back for more - and what we can do to get more for our money.

Alexis Conran tries to overcome his long-held indifference to the humble falafel. Also, the show's resident food scientist Dr Chris opens up the lab to see if they can crack the secret of the much-copied perfect Big Mac sauce.

Alexis gets a real exclusive, donning his uniform to step behind the scenes at a branch of genuine fast food colossus KFC, and is joined by a pair of vegetarian housemates to see if he can recreate a veggie KFC experience.