Jack Laufer Jack Laufer is the actor who played the Royal Children ' s Hospital doctor in J . J . Abrams ' sequel . Laufer is known for his recurring roles as the Homeless Hungarian in the comedy series " Huff " ( 2004 - 2006 ) where he worked with series regular Anton Yelchin and as Frank Keller in the award winning drama series " Mad Men " ( 2010 and 2012 ) . On the latter one he worked with " Trek " alumni Erin Cummings , Jim Jansen , Ray Proscia , Deborah Lacey , and Lawrence Pressman . Laufer made his television debut in a 1990 episode of which also featured Francis Guinan and Josh Pais . He then appeared in episodes of " Civil Wars " ( 1993 , with Jefrey Alan Chandler , Julie Cobb , and Renata Scott ) , " Murder She Wrote " ( 1993 , with Reiner Schöne ) , " Columbo " ( 1993 , with William Shatner , Molly Hagan , and Brian Markinson ) , " Diagnosis Murder " ( 1994 , with Ray Buktenica and Christopher Doyle ) , " L . A . Law " ( 1993 and 1994 , with Corbin Bernsen , Larry Drake , Joanna Cassidy , Matt McCoy , Marjorie Monaghan , Norman Large , and Marie Marshall ) , " One West Waikiki " ( 1994 , with Vaughn Armstrong , Daphne Ashbrook , Katherine Moffat , and Carey Scott ) , " Pride & Joy " ( 1995 , with Julie Warner and Susan Gibney ) , and " The Jeff Foxworthy Show " ( 1995 and 1996 , with Dakin Matthews , Bibi Besch , and Bill Erwin ) . During this time , Laufer also had supporting roles in the drama " Lost in Yonkers " ( 1993 ) , the television drama " And the Band Played On " ( 1993 , with David Clennon , Ronald Guttman , Ken Jenkins , Dakin Matthews , Lawrence Monoson , Jeffrey Nordling , Saul Rubinek , Rico Bueno , Reg E . Cathey , John Durbin , Richard Fancy , Keythe Farley , Jeff Hayenga , Thomas Kopache , Clyde Kusatsu , Rob LaBelle , and Angela Paton ) , ' s science fiction thriller " Ghost in the Machine " ( 1993 , with Ken Thorley , Clayton Landey , Charles Haugk , and Rick Scarry ) , and the television war drama " The Man Who Captured Eichmann " ( 1996 , with Nicolas Surovy and Joel Brooks ) . In 1997 , he portrayed the recurring role of Dr . Gerald Braun in four episodes of ' s drama series " The Practice " and worked with fellow " Star Trek " alumni Craig Wasson , Natalija Nogulich , James Greene , Robin Gammell , Michael Harney , Mickey Cottrell , Willie Garson , Jerry Sroka , Richard McGonagle , Miriam Flynn , Charles Cooper , Dierk Torsek , Barbara Tarbuck , and Karen Landry . Further television work includes guest roles in " Nothing Sacred " ( 1997 ) , " NYPD Blue " ( 1997 , with Gordon Clapp and Michael Buchman Silver ) , " Promised Land " ( 1998 ) , " Touched by an Angel " ( 1998 , with Bruce Davison ) , " DiResta " ( 1998 ) , " Judging Amy " ( 1999 , with Nicholas Cascone ) , and " Chicago Hope " ( 1999 , with Stephen Lee and Scott Klace ) and recurring roles in " Any Day Now " ( 1999 - 2000 , with John P . Connolly , Steve Rankin , Richard Penn , and Gina Hecht ) and " Crossing Jordan " ( 2002 , with Miguel Ferrer , Brad William Henke , Wallace Shawn , and Robert Duncan McNeill ) . In 2001 , Laufer appeared in the crime thriller " The Learning Curve " , with Tim Ransom , Michael Horton , and Brian Simpson . Beside featured parts in the science fiction film " The Day After Tomorrow " ( 2004 , with Aaron Lustig and Mark Thompson ) , the television drama " Sweet Nothing in My Ear " ( 2008 , with Rosemary Forsyth , Shelby Leverington , Barry Wiggins , Page Leong , Colby French , and John Rubinstein ) , and the television documentary " Proposition 8 Trial Re - Enactment " ( 2010 , with Adrienne Barbeau , Gregory Itzin , Kate McNeil , Armin Shimerman , Kitty Swink , and Todd Waring ) , Laufer also worked on " Mister Sterling " ( 2003 , with Nicole Forester ) , " CSI : Crime Scene Investigation " ( 2004 , with Chelsea Bond ) , " Frasier " ( 2004 , with Kelsey Grammer ) , J . J . Abrams ' " Alias " ( 2005 , with Rachel Nichols and Victor Garber ) , " The Closer " ( 2006 , with Raymond Cruz , Ray Wise , Raphael Sbarge , and Concetta Tomei ) , " Criminal Minds " ( 2008 , with Wil Wheaton ) , and " Cold Case " ( 2009 , with Jeff Kober ) . More recently , Laufer appeared in episodes of " Castle " ( 2011 ) , " Modern Family " ( 2012 ) , and " The Mentalist " ( 2012 , with Susan Gibney ) .