Season guide

Mum: Series 3

6 episodes Premiered May 15, 2019 Updated Oct 20, 2026

Previously on Mum

Season 3 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 Mum Season 2.
⚡ 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 3 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 3 Progress Shield

Last Watched:

Future titles & synopses blurred. Tap "Reveal" on any card to peek.

Binge Efficiency Engine

Season 3: Filler vs. Essential Canon

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

50%

Mytharc (3): Crucial lore & season climaxes

Core (3): Character development & subplots

Side Quest (0): Standalone / filler

S3·E1 Mytharc

Monday

May 15, 2019 · 28 min

Cathy and her family arrive in the countryside to celebrate Derek’s birthday. Michael arrives too, which Jason finds troubling.

S3·E2 Core

Tuesday

May 22, 2019 · 30 min

It is first thing in the morning and Cathy has a hangover. She and Michael try to piece together what happened the night before.

S3·E3 Core

Wednesday

May 29, 2019 · 27 min

Cathy and Michael get ready to go for a walk in the countryside, but Jason has concerns.

S3·E4 Core

Thursday

Jun 5, 2019 · 30 min

After a night out at a restaurant, Cathy and her family head to bed. Pauline's had too much to drink and Jason has something he needs to say to Cathy.

S3·E5 Mytharc

Friday

Jun 12, 2019 · 30 min

It's raining and Cathy and her family are stuck indoors. Pauline has a visitor and Cathy makes an important decision.

S3·E6 Mytharc

Saturday

Jun 19, 2019 · 28 min

It's Derek's birthday. The family come together to get the house ready for the party.