See some of Hollywood's biggest stars before they became household names. How many do you recognize?

Before They Were Famous: Actors' Early Roles

See some of Hollywood&#39;s biggest stars before they became household names. How many do you recognize?

From popular franchises to brand new worlds of exploration, science fiction and fantasy stories are more popular than ever. Check out our list of the best and brightest new and upcoming movies and series.

New and Upcoming Sci-Fi and Fantasy

Wilmer Valderrama, Gary Cole, Katrina Law, Sean Murray, and Brian Dietzen in NCIS (2003)

Pauley Perrette, Brian Dietzen, and Emily Wickersham in NCIS (2003)

Mark Harmon, Maria Bello, and Brian Dietzen in NCIS (2003)

Mark Harmon, Spencer Treat Clark, Wilmer Valderrama, and Brian Dietzen in NCIS (2003)

Mark Harmon, Wilmer Valderrama, Jennifer Esposito, Sean Murray, Brian Dietzen, Duane Henry, and Emily Wickersham in NCIS (2003)

Mark Harmon, Pauley Perrette, Wilmer Valderrama, Jennifer Esposito, David McCallum, Sean Murray, Brian Dietzen, Duane Henry, and Emily Wickersham in NCIS (2003)

Mark Harmon, David McCallum, and Brian Dietzen in NCIS (2003)

Mark Harmon, Jennifer Esposito, Andrea Grano, and Brian Dietzen in NCIS (2003)

Pauley Perrette and Brian Dietzen in NCIS (2003)

Jennifer Esposito and Brian Dietzen in NCIS (2003)

Mark Harmon, David McCallum, Sean Murray, and Brian Dietzen in NCIS (2003)

Mark Harmon, Pauley Perrette, Christopher B. Duncan, and Brian Dietzen in NCIS (2003)

David McCallum, Brian Dietzen, and Emily Wickersham in NCIS (2003)

Mark Harmon, Pauley Perrette, Sean Murray, and Brian Dietzen in NCIS (2003)

David McCallum, Michael Weatherly, and Brian Dietzen in NCIS (2003)

Pauley Perrette, Sean Murray, and Brian Dietzen in NCIS (2003)

Rocky Carroll, David McCallum, Michael Weatherly, and Brian Dietzen in NCIS (2003)

NCIS: Naval Criminal Investigative Service

Follows the Major Case Response Team (MCRT) from the Naval Criminal Investigative Service (NCIS), as they get to the bottom of criminal cases connected to Navy and Marine Corps personnel.

Wilmer Valderrama, Rocky Carroll, Gary Cole, Katrina Law, Sean Murray, Brian Dietzen, and Diona Reasonover in NCIS (2003)

Brian Dietzen: Jimmy Palmer • Dr. Jimmy Palmer • Flashback Male Cop

NCIS

Brian Dietzen credited as playing...

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