. "Linda Thompson"@en . "Walking the Line"@en . "Episode 46"@en . . . . "2007-07-21"^^ . . "\"Walking the Line\" is the 587th episode of Casualty and the 46th episode of the 21st series."@en . "David Innes Edwards"@en . . "Jason Sutton"@en . . . . . "\"Walking the Line\" is the 587th episode of Casualty and the 46th episode of the 21st series."@en . . . . . .