Year One (2009) is a prehistoric comedy adventure directed by Harold Ramis, starring Jack Black and Michael Cera as Zed and Oh, two inept hunter-gatherers exiled from their primitive tribe. Their misadventures lead them through a satirical version of biblical history, where they cross paths with figures like Cain and Abel, Abraham, and eventually find themselves in the notoriously sinful city of Sodom. The film blends slapstick humor with clever anachronisms, pitting modern sensibilities against ancient settings for consistent laughs.

Jack Black delivers his signature boisterous energy as the ambitious but clueless Zed, while Michael Cera provides perfect deadpan contrast as the meek Oh. Their comedic chemistry drives the film, supported by a strong ensemble cast including Oliver Platt, David Cross, and Hank Azaria. Harold Ramis's direction keeps the pace brisk, ensuring the 97-minute runtime never drags despite the episodic structure.

While the film received mixed reviews for its uneven humor, it remains an entertaining watch for fans of absurdist comedy and the lead actors. The anachronistic jokes and playful take on religious stories offer a lighthearted, farcical escape. If you enjoy comedies that don't take themselves seriously and appreciate Black and Cera's unique styles, Year One provides a fun, easygoing viewing experience perfect for a casual movie night.