“You have my undivided attention, young lady,” Maxwell Caulfield says bemusedly, as he notices my Grease 2 T-shirt. The British stage actor’s big-screen debut took place 40 years ago, when...

Forty years ago, Grease rama-lama-lama-ka-dinga-da-ding-dong’d its way onto the silver screen, going on to make history as the most successful movie musical of all time. And then, four years later,...