Continuity: After Tabitha spills her milk, the size and positioning of the spill changes significantly between shots.

Revealing: The wire used to control the flaming arrow's flight is visible in the closeup.

Other: Although Diane Murphy played "Annabelle", she is listed in the closing credits as having played "Diane".

Plot hole: Mrs. Kravitz, while standing in the Stephenses' front doorway, sees Santa Claus and assumes that it's Darrin in costume. However, the very next shot shows Santa exiting the kitchen (around the corner from the front door) and starting up the hallway toward the living room. There is no possible way Mrs. Kravitz could have seen him when she said she did.

Continuity: Tabitha's scarf jumps from one side of Samantha's lap to the other in consecutive shots.

Other: The Ferris wheel starts turning before the operator pulls the handle to start it.

Revealing: Paul Lynde is supposedly "in" the mirror near the front door, but as he waves his arm to cast a spell, the shadow of his arm waving is visible at the far left, revealing he is actually standing off camera at a spot where his reflection is visible. Elizabeth Montgomery also briefly glances at him.

Revealing: The shadow of one of the cameras - complete with protruding lens - is visible on Jack Cassidy's coat as he walks toward the living room.