After a wildly successful but grueling decade, ABBA were no more. Their ‘indefinite hiatus’ allowed each member of the group to follow their own path. But nothing lasts forever - not even endings.

In Episode 4, Sara Cox tells the story of a comeback like no other.

From pop history’s greatest Greatest Hits, to theatrical smashes, Hollywood acclaim and futuristic entertainment experiences, ABBA have achieved a truly timeless legacy.

Through the BBC Archive and brand new interviews, you’ll understand exactly why.