The final episode in the series weighs up restaurant portion sizes, which are getting bigger without us noticing. Kate Quilton takes some hungry taxi drivers out for a steak dinner but when they're given the portion sizes we ate a generation ago they aren't best pleased. Meanwhile, Simon Rimmer campaigns to bring the doggy bag to Britain. Teaming up with Mish Mash restaurant in Manchester, he gives the customers their leftovers while trying to get to the bottom of our very British embarrassment over taking them home with us. And with nearly 200,000 tonnes of food waste thrown away by restaurants each year, Kate is amazed when she visits a popular Mexican restaurant chain and learns about the surprising uses for leftover Mexican food.