There are two I might go far enough as to postpone plans for, which are:

Top Gear - anyone who likes cars, Jeremy Clarkson, or basic larking about in the most humorous way possible (in cars, of course).
Have I Got News For You - a satirical British quiz show about the last week of news. The two regulars are extremely fast (wit wise) and can be very funny.

And if you're a fan of the Documentary:

Blue Planet or Planet Earth - narrated by David Attenborough, both can be very interesting.