Hoping to exploit rabid fans of a long-lost cult classic? Feeling the need to pump some more revenue out of a long-dead television juggernaut? Fresh out of any and all original film ideas? Look no further!

Film adaptations of former (and occasionally current) TV series have been popular for years - and why not? It makes perfect sense to create a film adaptation of a beloved series. They each have a built-in fan base just waiting to be exploited.

These films usually vary widely. They can be a continuation of the narrative established in the series or they can keep the con...