Grantchester Guest cast, played by Felix Scott Episode 4x02: Episode 2 (Jan 18, 2019) Episode 4x03: Episode 3 (Jan 25, 2019) Episode 4x04: Episode 4 (Feb 1, 2019) Episode 4x05: Episode 5 (Feb 8, 2019) Episode 4x06: Episode 6 (Feb 15, 2019)