may be aware of those mysterious red letters embedded in the closing credits of shows like Endeavour, Grantchester, Magpie Murders, and more. Strung together, those letters spell a word with a ...

Others, like "vampire," "looney," and "11:11" are not typically thought of as red flags, Filbin said. "The why, of why these particular words were used, is less important than the what," said Filbin.