Tonight, TLC brings back the ever-popular American Chopper for 13 new episodes that follow the feuding Teutuls — Paul Sr. and Paul Jr. — and their competing Orange County motorcycle shops. American Chopper: Senior vs. Junior, airing Thursdays at 9pm ET/PT, picks up where last season ended: with the father firing the son from Orange County Choppers (OCC). The series will capture the renewed rivalry as Paul Sr. continues to build world famous custom bikes at OCC, while Jr. opens up Paul Jr. Designs – his start-up shop located across the street from OCC’s original site.  And the location isn’t the only rub – Jr. heats-up the competition by bringing back former OCC employees including his brother Mikey, Vinnie DiMartino, Robert ‘Nub’ Colard and Joe Puliafico.

In the battle between old and new, the father-son duo vie to see who can produce the most innovative choppers – with Sr. focusing on cutting edge technology while Jr. taps into his roots, building more traditional creations.  In addition to the always impressive bike builds, this season follows Paul Jr., as he struggles to launch a new business in a turbulent economy and handles the pressure of planning a wedding with his new fiancée.  Tonight’s episode gets off to a fiery start with an on-air radio confrontation between Jr. and Sr., laying the groundwork for the family feud that is destined to escalate over the course of the season.

Whose side are you on: Sr. or Jr.? Take the American Chopper: Senior vs. Junior poll on TLC.com and get caught up for tonight’s episode below. Also, stay tuned to TLC at 10pm ET/PT for the kick-off of a new season of BBQ Pitmasters!