This is, without a shadow of a doubt, the best Ice Age movie of the lot. Beautifully rendered scenery, hilarious characters with even more improbable punch-lines, and of course new additions to our already WAY too zany cast.
Manny has changed into this manic father-to-be, Diego is fed-up of playing nursemaid to a bunch of 'eatable' animals, and Sid is... well.. Sid is still the crazy smelly lisping character we love so much.
Do yourself a favour and get this on Blu-Ray. It is absolutely worth every penny.