How does the Countdown clock work?

Question

In the UK television show CountDown, the clock appears to run clockwise from 12 o'clock down to six o'clock (see Youtube video). Although I have never seen how the clock hand returns to the 12 o'clock point. After a round the camera seems to focus on the presenters, and contestants, thus when the next round is played everything is reset.

Possibilities;

• The hand completes the whole circumference of the clock, returning to the top
• It reverses direction to go back
• A technician pulls the hand from the face, and places it back to the top. (Least likely because of the disruption).

Answer 1

It looks like it just winds around and back whenever the camera isn't looking. You can see this in the 8 Out Of 10 Cats do Countdown special (16 08 13) where Jimmy gets excited and accidentally starts the countdown and they reset it with the camera still on it.