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    Greg Walker
    An image from Titans, one of the productions that also features Greg Walker.

    Greg Walker

    Greg Walker is a producer and writer.

    Smallville

    Smallville

    2001

    The X-Files

    The X-Files

    1993

    Titans

    Titans

    2018

    Extant

    Extant

    2014

    Without a Trace

    Without a Trace

    2002

    Vegas

    Vegas

    2012

    Three Rivers

    Three Rivers

    2009

    Harsh Realm

    Harsh Realm

    1999