Niamh, Oisin, Simon and Colm. Niamh, Oisin, Simon and Colm have given their all in the competition. But now they face the cooking challenge of a lifetime. Who will stand out in the heat of the kitchen and impress the judges - Robin Gill and Daniel Clifford. For their first task in semi-final the four celebrities travel to Central London to experience the pressure of service in a One Michelin Star restaurant Pied a Terre. They will be under the watchful gaze of Head Chef Andy McFadden. For forty two guests booked in for lunch each celebrity will be responsible for one course on the lunch menu. Returning to the MasterChef kitchen, it's 'make or break' for the celebrities as they are only two plates away from a place in . Cooking a main course and a dessert who will make it to the final where only one will be crowned Celebrity MasterChef champion 2017.