Doc treats a ganglion cyst (aka synovial cyst) by whacking it with a book to burst the little sack of fluid. That treatment is so classic that the swelling is sometimes called a 'bible cyst'. Nowadays whacking the cyst is generally discouraged.
One of the patients mentioned during a consult is Dan Glebals. He turns up in a later episode with a condition, dangly balls "Dan Glebals"!
PC Penhale speaks of teams: Butch and Sundance, historic outlaws; Bodie and Doyle, TV show cop partners; Eric and Morecambe. Eric Morecambe was a comedian who partnered with Ernie Wise for over 40 years in the award winning team 'Morecambe and Wise'.