A clip from the December 19 episode of "Numb3rs" has been released by CBS. The episode is called "Frienemies", and apt to its title, Charlie will be forced to work with his rival Marshall Penfield to solve a case where a grad vigilante group goes after a known criminal mastermind.
Penfield is played by guest star Colin Hanks, whom from the last name, is known as the actor son of Oscar winner Tom Hanks. Penfield and Colin argue about small things such as the marker that belongs to Colin but got broken when used by Penfield. Meanwhile, Don is still struggling to decide whether his religion holds the answers he's been looking for.
"Frienemies" will be the last episode of the show which will air this year. The show about solving crimes through mathematical approach, will return on January 9 with an episode called "Arrow of Time".