Lynette Rice
September 10, 2013 AT 07:13 PM EDT

In tonight’s season finale of Who Do You Think You Are on TLC, Jim Parsons (The Big Bang Theory) will explore the ancestors on his paternal side of the family. The Emmy-winning actor travels to Louisiana and eventually France, where he discovers generations of his forefathers who made an indelible mark in history.

Here’s a clip:

Meanwhile, TLC has ordered another 10 episodes of the show from Dan Bucatinsky and Lisa Kudrow that’ll bow in 2014. This year, Who Do You Think You Are? has averaged 1.8 million persons and has featured such celebrities as Christina Applegate, Kelly Clarkson, Cindy Crawford, Zooey Deschanel, Chelsea Handler, Chris O’Donnell, and Trisha Yearwood. The reality show takes celebrities on a journey into their personal histories, mining their surprising pasts to reveal unknown details about themselves and their families.

You May Like