The hidden world Visually beautiful threequel could do with more fire in her belly

reir: Dean DeBlois; Featuring: Jay Baruchel, America Ferrera, F Murray, Abraham Abraham, Harington Kit, Jonah Hill, Justin Rupple, Christopher Mintz-Plbade, Gerard Butler, Cate Blanchett (voice). Cert PG, 104 minutes

For viewers soaked in the sagas of the young Viking Hiccup and his adorable scaly scaler, Toothless, it is possible that the third film How To Train Your Dragon serves as a trilogy. But for those of us who have always thought that this series could have been done with a little more fire in the belly, it's a bit of a sinister postcript.

Since the release of his first album in 2010, DreamWorks' animated fantasy franchise has followed his characters almost in real time – and …