Four more professional chefs arrive to make their mark in the MasterChef kitchen. Monica Galetti sets the first test - a pasta challenge where two chefs must make agnolotti filled with burrata and sundried tomatoes, served with a pea and mint pesto. The technique of rolling and filling the perfect pasta pillows requires accuracy and precision. Will they be able to keep calm and deliver, or will nerves overcome them? Next, it's Marcus Wareing's test. Two chefs need to prepare pan-fried calves liver with potato cake and walnut beurre noisette. The chefs can't take their eye off the ball during these crucial 20 minutes or they risk overcooking the liver.