The spin-off is almost as old as television itself, and once upon a time it was considered to be an incredibly clever way to cash in on the success of any particular show by using a pre-established character or setting and attempting to have it pass for originality.
There are some examples of spin-offs done well, with the likes of Better Call Saul, Frasier and Angel all managing to cement a place as the equals of their respective parent shows.
On the other hand, there is a plethora of examples of TV spin-offs that not only failed to match up to the expectations set by their predecessors, but managed to be practically painful to watch.
It's upsetting, like getting on really well with someone at a party and then realising as soon as you're alone with them that they aren't as funny or as interesting as they seemed before. Once the veil is lifted, all you can do is extract yourself as quickly as possible and try to forget the whole experience.
Some scars run deep, though, and some spin-offs just can't be forgotten. Here are 10 of the worst TV spin-offs of all time.