"Headcases" premiered in 2008 to substantial fanfare as the spiritual successor to "Spitting Image", but where the latter show used rubber puppets to satirise public figures of the time, "Headcases" would use CGI caricatures.
After watching the first two episodes, I quite liked the show, but like "Spitting Image", some of the caricatures worked and others didn't. Those that worked included Prince Philip (portrayed as Dick Dastardly), David Miliband (portrayed as a gremlin), and Sir Trevor McDonald (the only one on the show who seemed to know what the heck was going on). The caricatures that didn't work include, among others, Tom Cruise, Piers Morgan, Bono, Dame Helen Mirren, and Dame Judi Dench, whilst other caricatures work, but they're stuck with the same jokes and lines for five episodes in a row (Nick Clegg, Victoria Beckham, Prince William and Prince Harry, among almost the whole cast).
The trouble with "Headcases" was that, for all of the effort put into it, it simply looks lacklustre when compared to "Spitting Image". It is certainly impressive that eight episodes of this series were made in so short a deadline, but the problem is that many of the sketches were re-used almost word for word, sometimes for a total of five episodes, which makes the show appear not funny but grating. Another problem was the lack of a main target for the show to parody. The name "Spitting Image" is almost synonymous with the Margaret Thatcher puppet that was undoubtedly the star of the show. With "Headcases", the closest thing we have to a star is a caricature of Piers Morgan, who does nothing except insult viewers and get crushed under a variety of heavy objects.
I applaud the creators for trying to give us a laugh, and I would recommend this series for anyone wanting to fill a quiet evening with a decent laugh, but as a whole, "Headcases" is incapable of matching its predecessor.