Prehistoric times get a comedic twist from director Harold Ramis in a spoof with jokes that aren't the most sophisticated.
Jack Black and Michael Cera play cavemen banished from their tribe, forcing them to rely on their own wits and that's trouble right there to survive in literally primitive territory.
Those who take their ancient history seriously should be braced to see it sliced and diced here; Hank Azaria, David Cross, Oliver Platt and Cera's "Superbad" pal Christopher Mintz-Plasse also are featured.
DVD extras: "making-of" documentary; deleted, extended and alternate scenes; outtakes. ** (PG-13 and unrated versions: AS, P, V) (Also on Blu-ray)
Buy 'Year One' on DVD.
Jack Black and Michael Cera in 'Year One'