Buffy
Armin Shimerman - Principal Snyder (19 episodes, 1997-2000)
Felicia Day - Vi (8 episodes, 2003)
Nicholas Brendon - Xander Harris (145 episodes, 1996-2003)
Felicia Day - Vi (8 episodes, 2003)
Nicholas Brendon - Xander Harris (145 episodes, 1996-2003)
Chuck
Mark Christopher Lawrence - Big Mike (87 episodes, 2007-2012)
Criminal Minds (until July 31st 2012)
Jonathan Frakes - Dr. Arthur Malcolm (1 episode, 2010)
Nicholas Brendon - Kevin Lynch (15 episodes, 2007-2012)
Nicholas Brendon - Kevin Lynch (15 episodes, 2007-2012)
Friends
Danny DeVito - Roy the Stripper (1 episode, 2004)
Numb3rs
Armin Shimerman - The Art-Authentication Board Member (1 episode, 2006)
Robert O'Reilly - Kurt Delock (1 episode, 2006)
Robert O'Reilly - Kurt Delock (1 episode, 2006)
Star Trek
Armin Shimerman - Quark / Audrid Dax / Herbert Rossoff (173 episodes DS9, 1993-1999)
Quark (Star Trek: Insurrection, 1998) (scenes deleted)
Quark (1 episode VOY, 1995)
DaiMon Bractor / Gift-Box Face / Letek / Quark (4 episodes TNG, 1987-1994)
Eddie Paskey - Lt. Leslie / Connors / Lt. Ryan / Crewman (59 episodes TOS, 1966-1968)
Garrett Wang - Harry Kim / Ensign Harry Kim / Ensign Kymble (170 episodes VOY, 1995-2001)
Gates McFadden - Dr. Beverly Crusher (Star Trek: Nemesis, 2002)
Dr. Beverly Crusher (Star Trek: Insurrection, 1998)
Dr. Beverly Crusher (Star Trek: First Contact, 1996)
Dr. Beverly Crusher (Star Trek: Generations, 1994)
Dr. Beverly Crusher (154 episodes TNG, 1987-1994)
Choreographer (Crew, 1 episode TNG, 1991)
Director (Crew, 1 episode TNG, 1994)
J.G. Hertzler - Advocate Kolos / Klingon Captain (2 episodes ENT, 2003-2004)
Hirogen Hunter (1 episode VOY, 2000)
Martok / Laas / Patron in Vic's Lounge / Roy Ritterhouse (27 episodes DS9, 1993-1999)
Jonathan Frakes - Cmdr William Riker (1 episode ENT, 2005)
Cmdr William Riker (Star Trek: Nemesis, 2002)
Cmdr William Riker (Star Trek: Insurrection, 1998)
Cmdr William Riker (Star Trek: First Contact, 1996)
Cmdr William Riker (1 episode VOY, 1996)
Thomas Riker (1 episode DS9, 1994)
Cmdr William Riker (Star Trek: Generations, 1994)
Cmdr William Riker / Cpt William Riker / Odan / Lt Thomas Riker (176 episodes TNG, 1987-1994)
Director (Crew, Star Trek: Insurrection, 1998; Star Trek: First Contact, 1996; 3 episodes VOY, 1995-1996;
3 episodes DS9, 1994-1995; 8 episodes TNG, 1990-1994)
Mark Allen Shepherd - Morn / Bar Patron in Morn's Chair (91 episodes DS9, 1993-1999)
Morn (1 episode VOY, 1995)
Morn (1 episode TNG, 1993)
Artwork Provider (Crew, 1 episode DS9, 1993)
Robert O'Reilly - Kago Darr (1 episode ENT, 2003)
Gowron / Countman (8 episodes DS9, 1994-1999)
Gowron / Scarface (5 episodes TNG, 1989-1993)
Simon Pegg - Scotty (Star Trek, 2009)
Walter Koenig - Cmdr Pavel Chekov (Star Trek: Generations, 1994)
Cmdr Pavel Chekov (Star Trek VI: The Undiscovered Country, 1991)
Cmdr Pavel Chekov (Star Trek V: The Final Frontier, 1989)
Cmdr Pavel Chekov (Star Trek IV: The Voyage Home, 1986)
Cmdr Pavel Chekov (Star Trek III: The Search for Spock, 1984)
Cmdr Pavel Chekov (Star Trek II: The Wrath of Khan, 1982)
Lt Pavel Chekov (Star Trek: The Motion Picture, 1979)
Ens Pavel Chekov (36 episodes TOS, 1967-1969)
William Shatner - Cpt James T. Kirk (Star Trek: Generations, 1994)
Cpt James T. Kirk (Star Trek VI: The Undiscovered Country, 1991)
Cpt James T. Kirk (Star Trek V: The Final Frontier, 1989)
Cpt James T. Kirk (Star Trek IV: The Voyage Home, 1986)
Cpt James T. Kirk (Star Trek III: The Search for Spock, 1984)
Cpt James T. Kirk (Star Trek II: The Wrath of Khan, 1982)
Cpt James T. Kirk (Star Trek: The Motion Picture, 1979)
Cpt James T. Kirk / Dr. Janet Lester (79 episodes TOS, 1966-1969)
Writer (Crew, Star Trek V: The Final Frontier, 1989)
Director (Crew, Star Trek V: The Final Frontier, 1989)
Quark (Star Trek: Insurrection, 1998) (scenes deleted)
Quark (1 episode VOY, 1995)
DaiMon Bractor / Gift-Box Face / Letek / Quark (4 episodes TNG, 1987-1994)
Eddie Paskey - Lt. Leslie / Connors / Lt. Ryan / Crewman (59 episodes TOS, 1966-1968)
Garrett Wang - Harry Kim / Ensign Harry Kim / Ensign Kymble (170 episodes VOY, 1995-2001)
Gates McFadden - Dr. Beverly Crusher (Star Trek: Nemesis, 2002)
Dr. Beverly Crusher (Star Trek: Insurrection, 1998)
Dr. Beverly Crusher (Star Trek: First Contact, 1996)
Dr. Beverly Crusher (Star Trek: Generations, 1994)
Dr. Beverly Crusher (154 episodes TNG, 1987-1994)
Choreographer (Crew, 1 episode TNG, 1991)
Director (Crew, 1 episode TNG, 1994)
J.G. Hertzler - Advocate Kolos / Klingon Captain (2 episodes ENT, 2003-2004)
Hirogen Hunter (1 episode VOY, 2000)
Martok / Laas / Patron in Vic's Lounge / Roy Ritterhouse (27 episodes DS9, 1993-1999)
Jonathan Frakes - Cmdr William Riker (1 episode ENT, 2005)
Cmdr William Riker (Star Trek: Nemesis, 2002)
Cmdr William Riker (Star Trek: Insurrection, 1998)
Cmdr William Riker (Star Trek: First Contact, 1996)
Cmdr William Riker (1 episode VOY, 1996)
Thomas Riker (1 episode DS9, 1994)
Cmdr William Riker (Star Trek: Generations, 1994)
Cmdr William Riker / Cpt William Riker / Odan / Lt Thomas Riker (176 episodes TNG, 1987-1994)
Director (Crew, Star Trek: Insurrection, 1998; Star Trek: First Contact, 1996; 3 episodes VOY, 1995-1996;
3 episodes DS9, 1994-1995; 8 episodes TNG, 1990-1994)
Mark Allen Shepherd - Morn / Bar Patron in Morn's Chair (91 episodes DS9, 1993-1999)
Morn (1 episode VOY, 1995)
Morn (1 episode TNG, 1993)
Artwork Provider (Crew, 1 episode DS9, 1993)
Robert O'Reilly - Kago Darr (1 episode ENT, 2003)
Gowron / Countman (8 episodes DS9, 1994-1999)
Gowron / Scarface (5 episodes TNG, 1989-1993)
Simon Pegg - Scotty (Star Trek, 2009)
Walter Koenig - Cmdr Pavel Chekov (Star Trek: Generations, 1994)
Cmdr Pavel Chekov (Star Trek VI: The Undiscovered Country, 1991)
Cmdr Pavel Chekov (Star Trek V: The Final Frontier, 1989)
Cmdr Pavel Chekov (Star Trek IV: The Voyage Home, 1986)
Cmdr Pavel Chekov (Star Trek III: The Search for Spock, 1984)
Cmdr Pavel Chekov (Star Trek II: The Wrath of Khan, 1982)
Lt Pavel Chekov (Star Trek: The Motion Picture, 1979)
Ens Pavel Chekov (36 episodes TOS, 1967-1969)
William Shatner - Cpt James T. Kirk (Star Trek: Generations, 1994)
Cpt James T. Kirk (Star Trek VI: The Undiscovered Country, 1991)
Cpt James T. Kirk (Star Trek V: The Final Frontier, 1989)
Cpt James T. Kirk (Star Trek IV: The Voyage Home, 1986)
Cpt James T. Kirk (Star Trek III: The Search for Spock, 1984)
Cpt James T. Kirk (Star Trek II: The Wrath of Khan, 1982)
Cpt James T. Kirk (Star Trek: The Motion Picture, 1979)
Cpt James T. Kirk / Dr. Janet Lester (79 episodes TOS, 1966-1969)
Writer (Crew, Star Trek V: The Final Frontier, 1989)
Director (Crew, Star Trek V: The Final Frontier, 1989)