The opening and closing sequences were created using hand-drawn cel animation to imitate computer graphics. The opening title sequence begins with a video game playing on a screen when Doctor "Tiger" Ninestein appears and says: "Terrahawks! Stay on this channel! This is an emergency!". The end credits, the Zeroid and Cube robots would often "play" noughts and crosses (tic-tac-toe) with each other, resulting in a different winner each week (the Cubes usually had to cheat and steal a Zeroid's position in order to win). The exception to this was the episode "A Christmas Miracle", which featured the song "I Believe in Christmas" as sung by Kate Kestrel played over a still of a Zeroid.