The New Statesman, is one of the most underated comedies of all time. Alan B'stard (Ric Mayall) is played to perfection, he is the most evil self obsessed character ever to enter the small screen. He contrasts brilliantly with the ever innocent Piers Fletcher-Dervish, at one point throwing him out of their parlimentary office. His ever "loving" wife Sarah at his side, blackmailing him for all he's worth. The best episode on the DVD, have the guest apperences of, both halfs of that dynamic duo, Stephen Fry and Hugh Lorrie (previously of Jeeves and Wooster and Blackadder), this episode has you laughing from the fist to the last second, a true classic.
If you look at it, it is far better value to get the box edition, but if £10 is all you have i can't think of a better way to spend it.