Episode 3 (S04E03)
S04E03
Geordie is summoned to look into a suspected break-in at a computer lab. Things take a dark turn when the lab director suddenly collapses and succumbs to mercury poisoning, leading Geordie to believe that there's more to this incident than meets the eye.
Show
Grantchester
Episode
S04E03
Air Date
Jan 25, 2019