Cast Credits Unforgotten (2015) Guest starring as Casper Barton (4 episodes) Episode 4x06: Episode 6 (Mar 29, 2021) Episode 4x05: Episode 5 (Mar 22, 2021) Episode 4x04: Episode 4 (Mar 15, 2021) Episode 4x02: Episode 2 (Mar 1, 2021) View 1 more View 1 less