There’s no doubt that a cameo or guest appearance from a beloved actor can help drive up viewership numbers and maybe even add some new fans. Although the Justin Hartley-led CBS procedural, Tracker, certainly wasn’t aching for extra eyes, it didn’t hurt when Jensen Ackles (Supernatural) and Melissa Roxburgh (The Hunting Party) were introduced to the story as the siblings of Hartley’s Colter Shaw. With the title recently wrapping its second season, all eyes are on what’s to come from Season 3. While there are plenty of directions that the next installment could move in, many fans are wondering if or when a Shaw family reunion will come into play.