Overly lazy and commitment-phobic, Dennis (Simon Pegg) suffers a minor breakdown and ditches his pregnant girlfriend Libby (Thandie Newton) at the altar. Five years later, Dennis realizes just how big a mistake he made. But just as Dennis sets out with his young son to woo her back, he learns that a flashy new suitor (Hank Azaria) has claimed her heart. So, in order to win her back, Dennis decides to prove himself by training for his first marathon with over-sexed best friend (Dylan Moran) as his coach. In way over his head, Dennis' pathetic attempt culminates in what may be the most spirited but hilarious race ever run.
Starring Simon Pegg, Hank Azaria, Ameet Chana, Dylan Moran, Thandie Newton, Harish Patel
Written by Michael Ian Black (Stella, The Pleasure of Your Company)