Heston and Kevin attend a medical conference for which Kevin has secured the services of his college friend Dr Bradley Dash, a young but respected practitioner, as guest speaker. Unfortunately Brad is also an irresponsible party animal who drags the two doctors along on a pub crawl and gets them drunk, Kevin having an unfortunate encounter with amorous patient Ellie. Meanwhile Rob is puzzled by John Knowles, who owns to several sex crimes, though it transpires that the culprit was his late father and John feels guilty for not stopping him.