Secret Diary of a Call Girl Guest cast, played by Joanna Bobin Episode 1x02: Episode 2 (Oct 4, 2007) Episode 2x01: Episode 1 (Sep 11, 2008) Episode 3x01: Episode 1 (Jan 28, 2010) Episode 3x02: Episode 2 (Jan 28, 2010) Episode 3x03: Episode 3 (Feb 4, 2010) Episode 3x04: Episode 4 (Feb 11, 2010) Episode 4x03: Episode 3 (Feb 15, 2011)