There is something fishy going on in this week's competition, as Mark Sargeant and Kenny Atkinson do battle in the kitchen. Mark and Kenny challenge each other with a foolproof fish pie. Kenny uses smoked kippers in his Craster fish pie, whereas Mark gets cheesy with a Parmesan-crusted fish pie. Mark cooks an easy-squeezy citrus squid salad, whilst Kenny whips up a pan-roasted cod with curried mussels. Mackerel and Scallops get the ultimate make over with Mark's mackerel pasty with pickled cucumber salad battling Kenny's pan-roasted scallops with confit chicken wings.