Greg Grunberg Gregory Phillip Grunberg , known simply as Greg Grunberg , is an actor from Los Angeles , California , who voiced James T . Kirk ' s stepdad in . This character was originally meant to be Kirk ' s uncle and was played by Brad William Henke in the film , but Henke ' s scenes were deleted and the character ' s voice - over dialogue was re - dubbed by Grunberg . In , Grunberg played the role of . Grunberg was offered the role of Chief Engineer Olson in " Star Trek " , but he could not accept the role as he was shooting a film he co - wrote and co - produced called " Group Sex " . The role of Olson was ultimately given to Greg Ellis . Although Grunberg was not able to work on the film during principal photography , he found a way into the movie before it completed post - production . He has been friends with " Star Trek " producer and director J . J . Abrams since childhood and has participated in many of his projects . Grunberg is currently best known for his role as telepathic police officer Matt Parkman on the hit NBC series " Heroes " . Zachary Quinto , who plays Spock in Abrams ' " Star Trek " , is also a regular on " Heroes " , as is Cristine Rose . Many other " Star Trek " alumni have appeared on this series , including Michael Dorn , Dominic Keating , Malcolm McDowell , Nichelle Nichols and George Takei . Before " Heroes " , Grunberg starred in two series from J . J . Abrams . The first was " Felicity " , in which he played Sean Blumberg . The next was " Alias " , in which Grunberg portrayed CIA field agent Eric Weiss . Grunberg also made an uncredited appearances in the Abrams - directed pilot episode of " Lost " ( co - created by Abrams and Damon Lindelof and co - starring Terry O ' Quinn and Daniel Dae Kim ) and the pilot for Abrams ' series " What About Brian " . Grunberg even had a brief role in Abrams ' motion picture directorial debut , Paramount Pictures ' " Mission : Impossible III " ( 2006 ) along with Simon Pegg , who played Montgomery Scott in Abrams ' " Star Trek " , and Tracy Middendorf . Grunberg made his television debut with a small role in the 1990 CBS movie " Stolen : One Husband " , starring Bruce Davison and Julie Warner . He later made guest appearances on such shows as " Melrose Place " ( with Rosana DeSoto ) , " Diagnosis Murder " ( with Susan Gibney ) , " Profiler " ( with Cyia Batten ) , " The Dead Zone " ( starring Nicole de Boer ) , " House " ( starring Jennifer Morrison ) , and " Monk " ( with Stanley Kamel and Peter Weller ) . In 2001 , he made three appearances on " NYPD Blue " , algon with Gordon Clapp Juliana Donald . In 2002 , Grunberg starred in the NBC series " The Jake Effect " with one - time guest performer Nikki Cox . The series was canceled before it even aired , but six of the seven episodes produced were shown on the Bravo channel during its " Brilliant But Canceled " block . Grunberg ' s early feature film credits include small roles in " The Pallbearer " ( with Mark Margolis ) , " Senseless " ( with Cyia Batten , Ivar Brogger , Brad Dourif , Jenette Goldstein , and Richard McGonagle ) , " BASEketball " ( with Raphael Sbarge ) , and " The Muse " ( with Dakin Matthews and Concetta Tomei ) . He also had a major supporting role in the 2000 science fiction thriller " Hollow Man " ( with Jimmie F . Skaggs and J . Patrick McCormack ) . More recent films , in addition to " Mission : Impossible III " , include " Austin Powers in Goldmember " ( with Tommy " Tiny " Lister , Jr . ) , " Malibu ' s Most Wanted " ( with Rey Gallegos ) , " The Ladykillers " ( with Tzi Ma and Stephen Root ) , and " Star Wars : The Force Awakens " ( with Simon Pegg ) . In 2016 , Greg began co - hosting and co - producing the series with writer / director .