The Clinic Guest cast, played by Liam Carney Episode 6x05: Episode 5 (Oct 26, 2008) Episode 6x07: Episode 7 (Nov 9, 2008) Episode 6x08: Episode 8 (Nov 16, 2008) Episode 7x02: Episode 2 (Oct 4, 2009) Episode 7x03: Episode 3 (Oct 11, 2009) Episode 7x04: Episode 4 (Oct 18, 2009)