We've had three movies to get to know what to expect from the Blue Sky Studios' world of prehistoric animals and this instalment delivers the regular natural disaster and the same reliable family entertainment.
Though the core cast remains and the opening features Scrat's ongoing acorn gag, there are plenty of new characters to freshen things up, although it's getting hard to ignore how familiar the formula is.
Manny (Romano) and Ellie's (Latifah) baby mammoth, Peaches (Keke Palmer), has now grown into a teenager, and this unusual family of loveable misfits is still together - but not for long. As the title suggests, the cataclysmic breakup of the Earth's continents launches them on their next adventure.
Though most of the herd remains trapped on land, Manny, Diego (Leary), Sid the Sloth (Leguizamo) and his granny (Wanda Sykes) are cast out to sea on a drifting iceberg.
They survive tidal waves and the perfect storm, only to come face to face with a bunch of pirates led by Captain Gutt (Peter Dinklage), a ruthless gigantopithecus (a gorilla-looking dude) who is determined Manny and friends will not return to shore.
