1 of 46 times Dee Wallace and Christopher Stone appeared together on screen, all but 1 while they were married in real life.
Angela Lansbury and Roddy McDowall acted together in Bedknobs and Broomsticks (1971). Angela played a witch.
Brad Dourif is well known as the horror icon Chucky from the Child's Play franchise. One of the installments Bride of Chucky (1998) features an episode from this show shown on a television set watched by Chucky's love interest Tiffany in the bathtub before switching to another channel.
The title is based on the three witches' dialog in Shakespeare's Macbeth (1948) (Act IV, Scene I): "Double, double toil and trouble; Fire burn and cauldron bubble."