As Parenthood is wrapping its six-season run on NBC, original cast member Sam Jaeger is segueing to a new drama project. He has been tapped for a lead role in the TNT drama pilot Lumen, written by Chris Black and directed by Joe Johnson.

In Lumen, the famous author of a best-selling series of fantasy books suddenly disappears, and a family of four finds themselves transported to the mystical alternate world that inspired her work. Jaeger will play Michael Hartman, the stepfather of 16-year-old Charlie whose obsession with finding the author thrusts his family into the surreal world of Lumen. Michael, a widower now married to Charlie’s mother and the father of a rebellious teenage daughter, is challenged with trying to keep his family together as they confront the amazing but dangerous reality of Lumen.

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Lumen hails from TNT Original Productions, Steven Spielberg’s Amblin Television, Full Fathom Five and ABC Signature Studios, with Johnson, Black, Amblin’s Darryl Frank and Justin Falvey as well as Full Fathom Five’s James Frey and Todd Cohen exec producing. Filming begins January 12 in New Zealand.

Jaeger, who has played Joel Graham for Parenthood‘s entire run, next will be seen in Paul Thomas Anderson’s Inherent Vice opposite Joaquin Phoenix and in Clint Eastwood’s American Sniper opposite Bradley Cooper. He is repped by Greene & Associates and Circle of Confusion.