Ian Patrick Williams Ian Patrick Williams is the actor who portrayed the holographic Dr . in the episode . Williams has appeared in television series and feature films since the early ' 80s . Among his first on - screen roles are episodes of " Archie Bunker ' s Place " ( 1982 , with Steve Susskind ) , " E / R " ( 1984 , with Jason Alexander and Pamela Adlon ) , " Hill Street Blues " ( 1986 , with Barbara Bosson ) , " Hooperman " ( 1987 , with Phil Chong and Chip Heller ) , and " Freddy ' s Nightmares " ( 1988 , with William Frankfather ) . He also portrayed supporting and leading characters in the horror film " Re - Animator " ( 1985 , starring Jeffrey Combs ) , the science fiction comedy " TerrorVision " ( 1986 , with Gerrit Graham , Chad Allen , and Bert Remsen ) , the horror film " Dolls " ( 1987 , with Stephen Lee ) , and the drama " Blueberry Hill " ( 1988 , with Dendrie Taylor ) . In the ' 90s he continued his television career and made guest appearances in television series such as " Alien Nation " ( 1990 , starring Eric Pierpoint , Gary Graham , and Michele Scarabelli ) , " Major Dad " ( 1991 ) , " Designing Women " ( 1991 ) , " Matlock " ( 1992 , with Robert Curtis Brown , David Froman , Jim Jansen , and Leon Russom ) , " Batman " ( 1992 , co - starring the voice of George Murdock ) , " Silk Stalkings " ( 1993 , with Tracy Scoggins and Victor Bevine ) , " Seinfeld " ( 1995 , starring Jason Alexander and with Richard Herd , Thomas Dekker , Brian McNamara , and Tom Wright ) , " Diagnosis Murder " ( 1996 , with Ronny Cox and Michael Reilly Burke ) , " Lois & Clark : The New Adventures of Superman " ( 1996 , starring Teri Hatcher and K Callan and with Keene Curtis , Pancho Demmings , and Harve Presnell ) , " NYPD Blue " ( 1997 , starring Gordon Clapp ) , and " Batman Beyond " ( 1999 , alongside Sherman Howard ) . In addition , he joined the cast of the science fiction film " Robot Jox " ( 1990 , with Gary Graham and Jeffrey Combs ) , the television bio drama " Reason for Living : The Jill Ireland Story " ( 1991 , with Jeff Austin and Dierk Torsek ) , the television bio drama " Roseanne : An Unauthorized Biography " ( 1994 , with David Graf , Joycelyn O ' Brien , and J . Patrick McCormack ) , and the drama " Born Bad " ( 1999 , with Larry Cedar and Marnie McPhail ) . After his performance in " Star Trek : Voyager " in 2000 , Williams appeared in the television drama " American Tragedy " ( 2000 , with Clyde Kusatsu , Christopher Plummer , Richard Cox , Francis Guinan , Jeff Kober , and Chase Hoyt ) , the television series " Strong Medicine " ( 2001 ) and " Frasier " ( 2002 , starring Kelsey Grammer and with Christopher Shea ) , the horror thriller " King of the Ants " ( 2003 , with Joe Davis ) , J . J . Abrams ' " Alias " ( 2005 , with Rachel Nichols ) , the " Medium " episode " Still Life " ( 2005 , directed by Robert Duncan McNeill ) , and in several roles in the daily soap " Days of Our Lives " ( 2000 - 2006 ) . More recently , Williams was part of the " ER " episode " Blackout " ( 2007 , with Scott Grimes and Leland Orser ) and the science fiction comedy " Superhero Movie " ( 2008 ) , which featured several " Star Trek " actors , including Christopher McDonald , Brent Spiner , Michael Papajohn , and Amanda Carlin . He has also finished the shootings for the drama " Polar Opposites " ( 2008 ) , the horror thriller " The Last Resort " ( 2008 ) , and the comedy " Touch Wood " ( 2008 ) .