March 30, 2017 at 03:26 PM EDT

We’re swinging even further into the ’60s when PBS’ labor-and-delivery drama Call the Midwife returns for a sixth season on April 2.

It’s 1962, to be exact β€” the women’s liberation movement is still in its infancy, while gangster twins the Krays rule London’s underworld. It’s against this shifting cultural backdrop that the nuns and medics of Nonnatus House face changes of their own after returning from a mission to South Africa. Sister Ursula’s (Harriet Walter) promotion means a demotion for Sister Julienne (Jenny Agutter). Barbara (Charlotte Ritchie) is no longer the newest midwife thanks to the introduction of Valerie (Jennifer Kirby). And even handyman Fred (Cliff Parisi) finds renewed purpose in Poplar.

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Of course, as much as things change, they also stay the same: Expect plenty of the usual heart-wrenching medical cases and social justice commentary throughout the new season.

For even more details on season 6 β€” and how the characters of Call the Midwife have evolved throughout the years β€” check out the video above. And be sure to tune in to the season premiere of Call the Midwife on PBS at 8 p.m. on Sunday, April 2.

Set in the 1950s, this BBC period drama (which airs on PBS stateside) follows nurse midwives working on the East End of London.
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