Katherine LaNasa arrives at the 28th Costume Designers Guild Awards on Thursday, Feb. 12, 2026, at The Ebell of Los Angeles in Los Angeles. (AP Photo/Chris Pizzello) In the hit US medical drama The Pitt , Katherine LaNasa plays a rather rational charge nurse who manages lifesaving shifts at a beleaguered medical trauma centre. Katherine herself, meanwhile, has told W Magazine that she believes in ghosts — and even claims to have seen one multiple times. The spectre in question? That of her ex-hu