2011 | 8 Episodes

Season 1 of Who Do You Think You Are? premiered on January 2, 2011.

2013 | 8 Episodes

Season 2 of Who Do You Think You Are? premiered on January 1, 2013.

2015 | 8 Episodes

Season 3 of Who Do You Think You Are? premiered on January 1, 2015.

2017 | 8 Episodes

Season 4 of Who Do You Think You Are? premiered on January 1, 2017.