Zach Galligan Zach Galligan is the actor who played David Gentry in the episode . He is best known for playing Billy Peltzer in the " Gremlins " movies , the second of which featured several other " Trek " actors , including Robert Picardo ( with whom Galligan worked in " In the Flesh " ) , Dick Miller , John Glover , Keye Luke , and Kenneth Tobey . Galligan starred with Jonathan Banks and Keye Luke in " Gremlins " in 1984 . A year later , in 1985 , he starred with Paul Sorvino in " Surviving " . In 1986 he acted in the mini series " Crossings " with Kelsey Grammer and Christopher Plummer . In 1992 , Galligan was in " Waxwork 2 : Lost in Time " with Marina Sirtis and Jim Metzler . The same year he starred in " Psychic " with Michael Nouri . Galligan also starred in " The Hitchhiker " in 1990 ; other " Star Trek " actors to have appeared on that show are Stephen Collins ( 1985 ) , Kirstie Alley ( 1985 and 1987 ) , Brad Dourif ( 1987 ) , Meg Foster ( 1989 ) , John Glover ( 1989 ) , and Louise Fletcher ( 1991 ) . In 1992 , Galligan acted on an episode of " Tales From The Crypt " ; other " Star Trek " actor to appear on the show are Bruce Davison ( 1995 ) , William Sadler and Jonathan Banks ( the same 1994 episode ) , Max Grodénchik ( 1994 ) , Robert Picardo ( 1993 ) , Alan Ruck ( 1993 ) , Wil Wheaton ( 1993 ) , Brad Dourif ( 1993 ) , Paul Dooley ( 1993 ) , Salome Jens ( 1992 ) , Steven Weber ( 1991 ) , John Glover and Aron Eisenberg ( same 1991 episode ) , Malcolm McDowell ( 1991 ) , Whoopi Goldberg ( 1991 ) , Teri Garr ( 1991 ) , Georgann Johnson ( 1990 ) , Iggy Pop ( 1990 ) and Brett Cullen ( 1989 ) . In 1993 Galligan was in " For Love and Glory " with Kate Mulgrew and Olivia d ' Abo . Later the same year he starred with Wren T . Brown in " Warlock : The Armageddon " . A year after , in 1994 , he acted in " Caroline at Midnight " with Virginia Madsen , Clayton Rohner , Jay Baker , Doug Wert , and Kirk Baily . Also in 1994 , he was in " Cyborg 3 : The Recycler " with Michael Bailey Smith and Malcolm McDowell . Three years later , in 1997 , he starred with Mary Crosby in " Cupid " . Also in 1997 , Galligan starred with Ron Perlman in " Prince Valiant " . He guest - starred on " Dr . Quinn , Medicine Woman " in 1997 , a show Chad Allen was a star of ; other " Trek " actors to appear on the show are Robert O ' Reilly ( 1998 ) , Georgann Johnson ( 1997 ) , Frank Collison ( 1997 ) Denise Crosby ( 1996 ) , Susanna Thompson ( 1995 ) , Gregory Sierra and J . G . Hertzler ( 1994 two - part episode ) , Fionnula Flanagan ( 1994 ) , and Colm Meaney ( 1993 ) . Galligan also acted in a 1998 episode of " Love Boat : The Next Wave " ; other " Trek " actors from the series are Ricardo Montalban , a star from the original series ( 1998 ) , Jolene Blalock ( 1999 ) , Molly Hagan ( 1999 ) , Adrienne Barbeau ( 1999 ) , Chad Allen ( 1998 ) , and Wil Wheaton and Lark Voorhies ( in same 1998 episode ) . In 1998 , Galligan starred in an episode of " The Net " . A year later , in 1999 , he appeared in " The Storytellers " with Brad Dourif . Also in 1999 , he appeared in " Arthur ' s Quest " with Clint Howard and in an episode of " Chicken Soup for the Soul " ; Wil Wheaton ( 1999 ) and Scarlett Pomers ( 1999 ) also starred in episodes . In 2001 Galligan starred in " The Tomorrow Man " with Corbin Bernsen . Two years later , in 2002 , he acted in " Infested " with Robert Duncan McNeill .