Erich Anderson Erich Anderson is the actor who played the Satarran impostor " Kieran MacDuff " in the fifth season episode in . He filmed his scenes for this episode between Monday and Wednesday and Friday and Tuesday on Paramount Stage 8 and 9 . Anderson has had a very lengthy career in television , with recurring roles in no less than five popular television series : " thirtysomething " as Billy Sidel ; " Felicity " ( co - created by J . J . Abrams ) as Dr . Edward Porter ; " NYPD Blue " ( starring Gordon Clapp ) as Don Kirkendall ( including two episodes with Gwynyth Walsh ) ; " Boomtown " ( starring Neal McDonough ) as Ben Fisher ; and " Close to Home " ( starring John Carroll Lynch ) as Detective George Branch . He also made guest appearances on " Murder , She Wrote " ( with William Windom ) , " Dallas " ( co - starring John Anderson , Glenn Corbett , Leigh J . McCloskey , Derek McGrath , William Smithers , Leigh Taylor - Young , and Morgan Woodward ) , " Melrose Place " , " Sisters " ( with Stephen Collins ) , " 7th Heaven " ( also with Stephen Collins , as well as Catherine Hicks ) , " Touched by an Angel " , " Chicago Hope " ( in an episode with Susanna Thompson ) , " ER " , " " , " Family Law " ( starring Christopher McDonald ) , " CSI : Miami " , and " Medical Investigation " ( starring Neal McDonough ) , among many other shows . After his appearance on " Star Trek " , Anderson appeared with TNG co - star Brent Spiner in two more projects : a 1995 episode of " The Outer Limits " ( directed by Joseph L . Scanlan ) and the 2004 television movie " Jack " . Other regular " Trek " performers whom Anderson appeared with outside of " Trek " are Scott Bakula ( in a 1989 episode of " Quantum Leap " , along with Dean Stockwell ) , Jolene Blalock ( in a 2000 episode of " CSI " in which she played his wife ) , Denise Crosby ( in a 1991 episode of " Sisters " , along with Frank Kopyc ) , Jeri Ryan ( in a 2001 episode of " Boston Public " ) , Armin Shimerman ( in a 2002 episode of " For the People " ) , and Connor Trinneer ( in a 2006 episode of " Close to Home " directed by Roxann Dawson ) . Prior to any of these , Anderson and his TNG co - star Jonathan Frakes were among the many " Star Trek " alumni who appeared in the epic 1986 Western mini - series " Dream West " . The other " Trek " performers who appeared in this series were F . Murray Abraham , Jeff Allin , John Anderson , Lee Bergere , James Cromwell , Michael Ensign , Alice Krige , Matt McCoy , Glenn Morshower , Fritz Weaver , Noble Willingham , and Anthony Zerbe . He made his feature film debut in the 1984 horror movie " Friday the 13th : The Final Chapter " ( co - starring Lawrence Monoson ) followed with a role in the popular actioner " Missing in Action " ( with Lenore Kasdorf ) that same year . Later film credits include " Patty Hearst " ( 1988 , with Kitty Swink ) , " Bat * 21 " ( 1988 , with Clayton Rohner ) , " The Glass Shield " ( 1994 , with Bernie Casey , Victoria Dillard , Jim Fitzpatrick , Natalia Nogulich , Lori Petty , and Biff Yeager ) , " Nightwatch " ( 1997 , with Brad Dourif ) , " Where ' s Marlowe " ( 1998 , with Miguel Ferrer and Clayton Rohner ) , " Beyond Suspicion " ( 2000 , with Casey Biggs and Jack Kehler ) , and " Unfaithful " ( 2002 ) . Anderson was also involved in a number of TV movies , including 1991 ' s " Love Kills " starring Virginia Madsen and Jim Metzler , 1992 ' s " Overkill " with Marc Alaimo and Jack Shearer , 2002 ' s " Due East " with Clara Bryant , and 2003 ' s " A Time to Remember " , co - starring Louise Fletcher , Rosemary Forsyth , and Megan Gallagher .