Primeval Guest cast, played by Jonathan Byrne Episode 4x03: Episode 3 (Jan 8, 2011) Episode 4x04: Episode 4 (Jan 15, 2011) Episode 4x05: Episode 5 (Jan 22, 2011) Episode 4x06: Episode 6 (Jan 29, 2011) Episode 4x07: Episode 7 (Feb 5, 2011)