Restaurant critic Giles Coren and writer and performer Sue Perkins spend a week going back to the food of their childhood in the 1970s. Cooking for them at home is top chef Mark Hix. Giles grows his sideburns, and Sue dons a wig of long hair as they dress in their flares and bright colours to go down memory lane.Chewing over a menu of fondue at the ski slopes, prawn cocktails and Angel Delight, Sue and Giles reminisce on how fun the 1970s were. With disco dancing, skateboarding, lots of sugary sweets and a dinner at Sue's old school, the Supersizers embrace the decade with childish enthusiasm. A soundtrack of 1970s favourites completes the picture of a time which seemed permanently sunny. The nation was slimmer and healthier in the 1970s than they are today, so after seven days, Sue and Giles discover whether their diet has been good for them.