3 ms·It is in fact a reference to "How to Dial a Murder", an episode of Columbo.by rzzzt 3y agoIt is in fact a reference to "How to Dial a Murder", an episode of Columbo.toyg 3y agoI've not seen the episode but I expect that is in turn a reference to Citizen Kane. In showbiz there is only one "Rosebud".qbert 3y ago"Citizen Kane" predates "Columbo".