William Devane

William Joseph Devane (born September 5, 1939) is an American, television and theatre actor, known for his role as Greg Sumner on the primetime soap opera Knots Landing (1983–1993) and as James Heller on the serial drama 24 (2005–2007, 2014). He is also known for his supporting roles in films such as McCabe & Mrs. Miller, Marathon Man (1976), and Space Cowboys (2000).

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