MASTERCHEF: L-R: Judge Joe Bastianich, judge Aarón Sánchez, host / chef Gordon Ramsay and special guest Nigella Lawson in the “London Calling – Pt. 2” episode of MASTERCHEF airing Wednesday, Sept. 11 (8:00-9:00 PM ET/PT) on FOX. © 2019 FOX MEDIA LLC. CR: Matt Frost/FOX.