Question: What was the name of the series which had an Southern Comfort film star playing an FBI agent?
Sentence (from "Keith Carradine"): He is perhaps best known for his roles as Tom Frank in Robert Altman's "Nashville", Wild Bill Hickok in the HBO series "Deadwood", FBI agent Frank Lundy in "Dexter" and US President Conrad Dalton in "Madam Secretary".
Relevant evidence: Yes