NEW CLIP: Horrible Histories The Movie 25th July 2019 by Sarah Leave a Comment I could have told you mum always knows best. Even if she’s a regicidal narcissist like Agrippina. Check out this new clip from Horrible Histories: The Movie – Rotten Romans, below. (You can also read my 3.5/5 review and my son’s 4.4/5 review.) The film is directed by Dominic Brigstocke and is released in the UK on 26 July.