First broadcast 9th May 2010.<br /><br />An Oxford professor, also an amateur astronomer and recently renewed churchgoer, is found dead in the school observatory under suspicious circumstances.<br /><br />Warren Clarke - Roger Temple<br />Deborah Cornelius - Dr Ella Ransome<br />Christopher Bowen - Professor Andrew Crompton<br />Sophie Ward - Isobel Crompton<br />Clare Holman - Dr. Laura Hobson<br />Robert Hardy - Sir Arnold Raeburn<br />Ruby Thomas - Kate Cameron<br />Diana Quick - Gwen Raeburn<br />Anthony Calf - Malcolm Finniston<br />Jonathan Cullen - Father Francis<br />Annabelle Apsion - Babs Temple<br />Andrew Hawley - Jez Haydock (as Andrew Hawyley)<br />Kevin Whately - DI Robert Lewis<br />Laurence Fox - DS James Hathaway<br />Bernard Lloyd - Ted Temple<br />Liz Crowther - Mrs Leeming<br />Ben Addis - Junior Porter<br />Nicholas Howe - Undergraduate<br />Rebecca Front - Chief Superintendent Jean Innocent<br />Robin Kermode - Interviewer<br />Colin Dexter - Diner<br />Chris Wilson - Police Firearms Tech
