although a few people have point out this be a 70 tv show in the uk and this be not a spin off movie . it actually an abridged version of the show and cleverly edit into a movie . the fact that nobody have notice that ( even the people who remember the show ) just prove the editor have do a very good job . a others have point out and if you remember watch this on tv then this be an excellent piece of nostalgia . even if you never see it first time it still an enjoyable watch and but just remember it be shoot on a 70 tv show budget ( a uk one at that ) so it not a major production . although in my opinion it just add to it gritty charm .