Seth Isaac Johnson (born July 10, 2000) is a Canadian actor, recently known as Finn in R.L._Stine's 2025 YA Horror, "Pumpkinhead" and "Pumpkinhead 2" https://collider.com/elvira-rl-stines-pumpkinhead-2-images-cassandra-peterson/and Max, in Megan Park's 2024 comedy-drama film My Old Ass, Shawn Raider in Supernatural, as well as the recurring role of Eugene in Season 2 of the hit series Firefly Lane. Early in his career, Johnson was notable for his recurring dramatic role as Denny Larsen in AMC's The Killing. Also as Danny in Nickelodeon's original TV movie Splitting Adam.
Life and career
Seth landed his first major role in AMC's dark crime drama The Killing. Appearing in over 20 episodes, Seth delivered a raw performance as the younger brother of a murdered girl. Award-winning director Patty Jenkins wrote of Seth, "He is truly exceptional and gifted beyond his years...He was a joy to work with in all regards and it was this and his talent that helped create the masterful series "The Killing” became.
Seth was nominated for a Best Guest Star Performance for his role of Shawn Raider in the TV Series Supernatural, at the 2018 Leo Awards. He completed a degree in Behavioral Neuroscience while filming recurring role in Netflix series Firefly Lane before spending his first summer out of school filming Writer/Director Megan Parks Sundance hit, My Old Ass, in Muskoka.
Seth is the son of actor Tanis Dolman and musician Jason O. Johnson.
Filmography
Film and television Year Title Role Notes 2010 Badass Thieves Carter 2011 To the Mat Wade 2011–12 The Killing Denny Larsen 26 episodes 2012 Mr. Young Burlap Sack E.T. 1 episode 2013 Motive Phillip Harper 2014 The Color of Rain Drew Kell 2015 Splitting Adam Danny 2015 Into the Grizzly Maze Young Beckett 2016 My Sweet Audrina Arden Lowe (age 15) 2016 Young & Reckless Bryce 5 episodes 2017 Mech-X4 Langley 1 episode 2017 The Dangers of Online Dating Taylor 1 episode 2017 Supernatural Shawn Raider 1 episode 2017 Last Night in Suburbia Brent 2018 Once Upon a Time Young Hansel 1 episode 2019 iZombie Freylich 3 episodes 2021 Firefly Lane Eugene 5 episodes 2021 Love in full swing Hudson Brandon 2022 Love Amongst the Stars Bryce 2022 Let's Get Physical Ben Martin 2024 My Old Ass Max LaBrant 2025 In the Shadow of the Sequoia Vale 2025 R.L._Stine's Pumpkinhead Finn 2026 R.L._Stine's Pumpkinhead 2 Finn Awards and nominations Johnson was nominated for "Best Performance in a TV Series (Comedy or Drama) - Supporting Young Actor The Killing (2011) category at the 34th Young Artist Awards.
Johnson was 2015 Joey Award Winner Best Actor in a Feature for his portrayal of Beckett in Into the Grizzly Maze.
Johnson was nominated for “Best Guest Performance” for his portrayal of Shawn Raider in the Supernatural episode “Advanced Thanatology” in the 2018 Leo Awards.
References
External links Collider - R.L. Stine's Pumpkinhead 2 Hollywood Reporter - R.L. Stine's Pumpkinhead leads with Seth Isaac Johnson as Finn Supernatural interview with Seth Isaac Johnson Deadline - Luber Roklin Entertainment acquires Seth Isaac Johnson Everything about Firefly Lane's Eugene
AMC Q&A with Seth Isaac Johnson