I've finally solved the mystery of why, no matter how many times I update the programme on my digibox to record Family Guy, I always end up getting half episodes (in fact usually the second half of one episode followed by the first half of another).

The reason for this is that the broadcast time for Family Guy on BBC3 is determined by a complex, non-recurring numerical sequence which ensures that not only is it on at different times on consecutive days of the week, but it's also on at different times on the same day of the week one week later.

Here's the Family Guy double-bill schedule for the next eight days:

• Today: 10:50pm and 11:10pm
• Tomorrow: 10:55pm and 11:20pm
• Sunday: 10:00pm and 10:20pm
• Monday: 11:30pm and 23:55
• Tuesday: 11:00pm and 11:25pm
• Wednesday: 10:45pm and 11:10pm
• Thursday: 11:00pm and 11:25pm
• Friday: 10:30pm and 10:55pm

I used to be good at those “what's the next number in this sequence” IQ-type puzzles but this one has got me completely stumped.

If anyone manages to crack the code, please let me know, because I'm getting a bit tired of watching Family Guy half an episode at a time, and usually in the wrong order.