Whilst undertaking the painstaking research this piece involved (basically I sat in my pants watching YouTube for a few hours) I came to one important conclusion: there's been a glut of truly great television over the past twenty years.

Sometimes we forget how hard the best dramas hit us when we first saw them, or how our favourite comedies shaped our sense of humour. Looking back on some of the all-time greats, you have to appreciate the talent behind the scenes - considering some of these shows have ran for multiple seasons and racked up episode counts in the hundreds, it's amazing how consistent the quality is.

However, even the most highly regarded shows don't get it right every time. The blunders on this list stem from a range of factors - some of the shows had arguably been going on for too long and become stale, while others are the result of writers straying from what made us fall in love in the first place. Others, meanwhile, fall squarely into the "what the hell were they thinking?" category and defy all explanation.

Below are ten turkeys from otherwise perfect shows. Spoilers most definitely will ensue.