Colm Feore took it upon himself to make friends with all the child actors, as he didn't want any of them to be genuinely scared of him.
The book that Cat reads to the children, "The Little Puppy", was a favorite of Danny Torrance in "The Shining" (another Stephen King story).
The miniseries takes place on Little Tall Island off the coast of Maine, the same setting as Stephen King's Dolores Claiborne (1995). This is alluded to in the script.
Stephen King: Does an ad on the smashed-in TV in Martha Clarendon's house for the litigation law firm of Macintosh & Redding (1-800-1-STIK-EM).