Preview Preview: S5 | 28s Grantchester Relationships & New Characters. What to Expect in Grantchester Season 5 New relationships, unexpected secrets and a slew of new cases…and we’ve got all the scoop. Tom Brittney Answers Our Questions! Season 5 Grantchester Episode 4. Grantchester is officially coming back for another chapter. A streaker is found dead, sparking an unusual case for Will and Geordie. New relationships, deepening storylines, unexpected secrets and of course a … Grantchester Season 5 is airing now on MASTERPIECE Sunday nights at 9/8c. Preview: S5 | 28s Share this video: Share this video on Facebook. Don't miss the Season 5 premiere on Sunday, June 14 at 9/8c. Use one of the services below to sign in to PBS: ... Grantchester. Get official news on plot & filming, plus stars Tom Brittney & Robson Green! Grantchester will return to MASTERPIECE on PBS for a 5th Season in 2020! Use one of the services below to sign in to PBS: ... Grantchester is back! Share this video on Twitter. Grantchester Season 5 is coming to MASTERPIECE on PBS on Sunday, June 14, 2020 at 9/8c. Masterpiece PBS officially announced plans for a season five in July of 2019.