Who Do You Think You Are?: Season 18

7 episodes Premiered Oct 12, 2021 Updated Oct 3, 2026

Previously on Who Do You Think You Are?

Season 18 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

⚡ Directly follows the overarching narrative developments of Who Do You Think You Are? Season 17.
⚡ Faction dynamics and core character alliances shift under escalating external stakes.
⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
⚡ Sets up serialized story arcs that build directly toward the climactic season finale.

Season 18 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 18 Progress Shield

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Season 18: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

43%

57%

Mytharc (3): Crucial lore & season climaxes

Core (4): Character development & subplots

Side Quest (0): Standalone / filler

S18·E1 Mytharc

Josh Widdicombe

Oct 12, 2021 · 60 min

Comedian Josh Widdicombe embarks on a rollercoaster ride through his extraordinary family history. After a less than promising start with an ancestor who was cut out of the family

S18·E2 Core

Dame Judi Dench

Oct 19, 2021 · 60 min

Shakespearean actor, movie star and national treasure Dame Judi Dench's journey begins with her father Reginald Dench, who never spoke of his experiences during the First World War

S18·E3 Core

Alex Scott

Oct 26, 2021 · 60 min

Presenter and former footballer Alex Scott learns about her Jewish ancestry and travels to Jamaica for the first time in her life to find out about her great-great-grandmother.

S18·E4 Core

Joe Lycett

Nov 2, 2021 · 60 min

Comedian and presenter Joe Lycett manages to find humour everywhere, but apart from his Edwardian great grandad – a member of the Royal Antediluvian Order of the Buffaloes in Notti

S18·E5 Core

Pixie Lott

Nov 9, 2021 · 60 min

Singer-songwriter and talent show judge Pixie Lott hopes to confirm a family story that she has Italian ancestry from Verona, but instead discovers ancestors battling poverty and h

S18·E6 Mytharc

Joe Sugg

Nov 23, 2021 · 60 min

YouTuber and actor Joe Sugg uncovers some incredible stories in his family tree, with a little help along the way from fellow social media star and big sister, Zoe. Joe, very aptly

S18·E7 Mytharc

Ed Balls

Nov 30, 2021 · 60 min

Ed Balls, former Labour politician, sequinned Strictly dancer and TV presenter, grew up in a family that wanted to make the world a better place. His mother Carolyn’s dementia mean