Available on BBC iPlayer
Great Movie Mistakes IV: May the Fourth Be with You Cutdowns, Episode 7
7/8 The bits Hollywood hoped viewers wouldn't spot, in another great compilation of foul-ups.
Great Movie Mistakes III: Not in 3D, Episode 11
11/13 Robert Webb reveals his favourite bits from the hit movies of recent times - the mistakes.
Great Movie Mistakes Cutdowns, Episode 13
13/13 The cinematic blunders and gaffes that the film studios hoped they had got away with.