Directed by: John Hough
Starring: Christopher Lee, Bette Davis, Kim Richards, Ike Eisenmann
Revealing mistake: At the beginning, as the flying saucer lands at the stadium, the shadow the ship cast doesn't change size as it gets lower to the ground.
Revealing mistake: When Tony is stacking the wine barrels in Gannon's lab, you can see the wires pulling the last barrel up into the pyramid.
Continuity mistake: When Tony and Tia are being driven to their hotel, the same footage is shown behind them a few times e.g. A truck turning off the road when their driver shouts at an overtaking driver and a few minutes later when he shouts at the same driver again.
Answer: In "Escape To Witch Mountain", Tony tells the lady in charge of the children's home that their foster parents adopted them when Tia was 3 and Tony was 5. "Escape" possibly takes place 6 years after they were adopted, making them 9 and 11 in "Escape", and 12 and 14 in "Return".