Over an August Bank Holiday, an empty Oxford college is the venue for a weekend attended by professional quiz contestants. Lewis and Hathaway are called in when outstanding competitor Ethan Croft is found floating dead in the college fountain. They l... (more)earn that Croft was an outrageous flirt with a number of secrets, and the pair race to uncover the killer before the gathering breaks up. Meanwhile, Hathaway discovers that Lewis was planning a romantic weekend at Glyndebourne with a mystery date.

Adam James, Alan Davies, Alastair Mackenzie, Anna Koval, Ian Mercer, Jamie Michie, Nicholas Farrell, Ruth Gemmell, Sally Bretton, Susannah Doyle, Timothy West