NBC (9 p.m. ET)
David Niven is wonderfully suave as the World War II British espionage director, Sir William Stephenson, lionized in a 1976 best-seller that inspired this six-hour series (it winds up Monday and Tuesday). Michael York is fine as a scenic designer turned agent, while the onetime princess of hippie actresses, Barbara Hershey, has matured as a spy who parachuted into Occupied France.
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