5. Plan 9 From Outer Space (1959)
Often referred to as the worst movies ever made, this dreadful sci-fi is full of the kind of effects that were already dated at time of release, some frankly cringe-worthy line delivery and an awful, clunky script and the most obvious conclusions for some of its characters. In the film, humankind is making a sun driven sun so aliens naturally resurrect vampires and zombies to stop them. It's arguably the least convincing B-Movie of all time: the cemetery is obvious a weed invested lot, and a couple of chairs and a shower curtain make up a cockpit. It leaves you wondering how come Night Of The Living Dead never looked so bad on this sort of budget. The camera mistakes on this would make first year students cringe, sets fall down and characters stumble, and in truth its more like a gag reel than the final cut. But then it remains an absolute must watch for aspiring film makers.