After editorial chose the best takes for performance, the "split-screened" heads would be lined up. FuseFX then created connective material between the heads as a malleable mix of skin, collarbone, and neck tendons. "If Bette turned her head," says Piccioni, "it would stretch the muscles on Dot's side of the body. Also, she only had a single set of lungs, so both sides had to breathe in sync with each other. We did a lot of research on, medically, how all that would work."
The visual-effects work extended to Bette and Dot's clothes, too. FuseFX artists manipulated the costume to react to either side's movements, and they also repositioned the shoulders and waist so that the twins' proportions were correct. "It was incredibly involved," adds Piccioni, who also says gags like this were completed at breakneck speed on an abridged television schedule.