The Guardian season 3 episode 17
Episode title: The Watchers
Nick sees a change in his dad that worries him, Burton keeps getting dizzy due to Vertigo. Burton wonders if he will be a good dad to Shannon. After Nick & Burton learn Shannon has been found they try to get the woman who called police about Shannon to tell Nick and Burton where Shannon might be. When Burton offers to pay the woman to tell where Shannon is Nick isn't sure the woman will tell the story.
