A new image from debuts Tom Welling as Sam and Dean's grandfather, Samuel Campbell. A prequel spinoff of the CW series , follows Sam and Dean's parents, John (Drake Rodger) and Mary Winchester (Meg Donnelly), as they navigate their budding relationship while trying to stop a race of monsters from taking over the world. The series premiered on October 11 and is set to run for 13 episodes. While features a new cast, several

alumni make appearances, including Jensen Ackles reprising his role as Dean, Richard Speight Jr. returning as Loki, and Gil McKinney as Henry Winchester.

In a first look at episode 7from , as Mary's father, Samuel Campbell. Samuel first appeared in season 4, played by Mitch Pileggi, when Dean traveled back in time to 1973. The episode 7 logline reads "" Welling is also currently starring in the CW series

alongside Brendan Fraser.

Will Tom Welling's Winchester Role Break Supernatural Canon?

Since was first pitched by Ackles, who is an executive producer on the series, for not adhering to canon. While explores John and Mary's young adult years in much more depth, their lives were also touched upon in

, which tells a very different story than the prequel. begins in 1972, which sees Mary's family torn apart as she tries to track down her missing father. She does this alongside John, who becomes a hunter with her. However, in , John doesn't become a hunter until after Mary's death in 1983. With these changes already in place, there's a chance that Welling's appearance as Samuel on will further twist

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