John Mahoney (Martin Crane)
Bebe Neuwirth’s onscreen ex-father-in-law, John Mahoney, also appeared on Cheers before he was cast in the entirely different role of Frasier and Niles’ father, Martin - for which he earned two Emmy nominations. The actor, originally born in England in 1940, was previously best known for the historical baseball film Eight Men Out and the iconic 1989 rom-com Say Anything - both of which starred John Cusack.
John Mahoney followed Frasier by, once again, playing Kelsey Grammer’s father on The Simpsons as Sideshow Bob’s dad, crossing paths with Jane Leeves as Betty White’s boyfriend on Hot in Cleveland, and even returning to Broadway in 2007’s revival of Prelude to a Kiss. His final acting credit, Polish drama Mariette in Ecstasy, was filmed in 1995, but released in 2019 - a year after his passing due to brain disease and lung cancer, at the age of 77.