"Tony McHale"@en . . . . "Episode 21"@en . . . . "United... By Blood"@en . "Tony McHale"@en . . . . . . . . . "1997-02-01"^^ . "\"United... By Blood\" is the 197th episode of Casualty and the 21st episode of the 11th series."@en . "\"United... By Blood\" is the 197th episode of Casualty and the 21st episode of the 11th series."@en . .