DVD: Percy Jackson and...For retail & rental, (20th Century Fox)

Harry Potter meets Clash of the Titans, as a schoolboy (Logan Lerman) discovers he's the super-powered son of Poseidon.

Steve Coogan, Pierce Brosnan and Sean Bean co-star, but none of them gets as many laughs as Harry's supporting cast – not intentionally, anyway – and the plotting is creaky compared with JK Rowling's. Still, it's harmless and sometimes spectacular fun. And it might even induce its younger viewers to read some Greek myths.