|Portrayed by||Johnny Messner|
|First Appearance||The Last Drive-In, Bullet|
|Last Appearance||Free Love|
Ryan Cavanaugh is a FBI Agent who helped Lilly to identify the serial killer. He is partner to Diane Yates. He used to have a young fiance who died of an illness. He had a fling with Lilly when they investigated a murder that happened at Woodstock.
- in real life is married to Kathryn Morris
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