CRIME-TIME TV

Unless you wanna sleep wit’ da fishes, keep dis under yer hat, paisan. It’s hush-hush, but former “Alice” star Linda Lavin will join “The Sopranos” next season — but she’s clammed up about what role she’ll play! “I’m sworn to secrecy,” Linda confided to a pal. “I’m not even allowed to tell my own family.”