Information for Don't Rock the Boat at The Mill, Sonning (Play). The peaceful waters of the Thames get decidedly choppy when scheming Arthur Bullhaed arranges a quiet weekend on this shiny new boat. Arthur has ulterior motives and the arrival of councillor John Coombes, his sexy wife Carol and teenage daughter Wendy leads to anarchy as personalities clash at every turn. Together with his skittish wife Mary and rebellious daughter Shirley, Arthur Bullhead gives the Coombes a weekend they'll never forget..