Who Do You Think You Are?2004 –

Specials

2 episodes2007

Season 1

10 episodes2004

Season 2

6 episodes2006

Season 3

8 episodes2006

Season 4

7 episodes2007

Season 5

8 episodes2008

Season 6

11 episodes2009

Season 7

9 episodes2010

Season 8

10 episodes2011

Season 9

10 episodes2012

Season 10

10 episodes2013

Season 11

10 episodes2014

Season 12

10 episodes2015

Season 13

10 episodes2016

Season 14

10 episodes2017

Season 15

8 episodes2018

Season 16

8 episodes2019

Season 17

4 episodes2020

Season 18

7 episodes2021

Series 19

5 episodes2022

Series 20

9 episodes2023

Series 21

7 episodes2024

Series 22

8 episodes2025

Series 23

8 episodes2026