Episode 1

S4 E1: It's 1956 and Sidney Chambers, vicar of Grantchester, is yearning for some excitement. However, his best friend, DI Geordie Keating, is starting to worry that this daredevil attitude is verging on a death wish. Seeking inspiration, Sidney and his curate, Leonard Finch, attend a talk by Reverend Nathaniel Todd, who is part of the formative Civil Rights movement in America and giving a speech in Cambridge. During the event, protestors disrupt Todd's speech and release fireworks, causing the audience to panic and leading to a crush as dozens of people try to escape through a locked door. In the chaos, a man is stabbed and killed by an unseen assailant. The murder sees racial tensions spike and Geordie is called in to investigate.