Gregory Sierra Gregory Sierra is the retired American actor who played Corbin Entek in the episode . He was born in New York City , New York . Television . Regular and recurring roles . Sierra was a main cast member on the police comedy series " Barney Miller " during the show ' s first two seasons ( 1975 - 1976 ) , on which he portrayed Detective Sergeant Chano Amenguale . Ron Glass was also a regular on this series , and James Gregory made frequent recurring appearances . Sierra is also known for his recurring roles on the comedy series " Sanford and Son " ( as Puerto Rican neighbor Julio Fuentes ) and " Soap " ( as anti - Communist revolutionary Carlos " El Puerco " Valdez ) . On the latter series , he worked with such performers as Hamilton Camp , Robert Costanzo , and Eugene Roche . In addition , Sierra was the series lead on the short - lived 1978 television sitcom " A . E . S . Hudson Street " . His co - stars on this series included fellow " Star Trek " alumni Rosana DeSoto , Stefan Gierasch , and Allan Miller . In 1983 , Sierra worked opposite guest actor Henry Darrow on the short - lived CBS comedy series " Zorro and Son " . Sierra and Darrow previously worked together when Sierra made an appearance on the western series " The High Chaparral " , on which Darrow was a regular . Also in 1983 , Sierra had a four - episode arc as Assistant District Attorney Alvarez on the drama series " Hill Street Blues " . Barbara Bosson and James B . Sikking were regulars on this series . Sierra was a regular on the action / drama series " Miami Vice " when the show began in 1984 . He portrayed Lt . Lou Rodriguez , Detective Sonny Crockett ' s superior . After only four episodes , however , Sierra asked to be written out of the series . Among the performers he worked with during his short time on this series were Ron Taylor and Bill Smitrovich . In 1988 , Sierra was a regular on NBC ' s short - lived science fiction series " Something Is Out There " . His most recent series was the sitcom " Common Law " , which ran briefly in 1996 . Other television credits . Sierra appeared in three episodes of " Mission : Impossible " : two with Leonard Nimoy in 1970 and one with William Shatner in 1972 . Sierra also guest - starred as a Jewish radical on an episode of the acclaimed comedy series " All in the Family " in 1973 , along with John Putch . In 1973 , Vincent McEveety directed Sierra in a two - part episode of the western series " Gunsmoke " . Sierra made a return to the series in 1975 , under the direction of McEveety ' s brother , Bernard , and working with John Colicos . Before they worked together on " Barney Miller " , Sierra and " Voyager " guest actor Ron Glass were guest stars on a 1973 episode of " Hawaii Five - O " . The following year , Sierra guest - starred on NBC two police dramas starring " Star Trek " alumni : " McCloud " ( starring Ken Lynch , in an episode with Teri Garr , Michael Pataki , and Eugene Roche ) and " Petrocelli " ( starring Susan Howard ) . Between 1985 and 1995 , Sierra guest - starred on six episodes of " Murder , She Wrote " , three of which had him playing Police Lieutenant Gabriel Caceras . Among the actors he worked with on this series were Ed Bakey , Kim Darby , Cliff DeYoung , Jerry Hardin , Gregg Henry , Richard Herd , Sally Kellerman , Richard Libertini , Laurence Luckinbill , and Dan Shor . Sierra has guest - starred in two episodes of " Cagney & Lacey " , one with Janet MacLachlan and another with Brock Peters . He was also seen in three episodes of " MacGyver " , including one with Bruce McGill in 1986 . Since then , he has appeared on such sitcoms as " Growing Pains " ( with Kenneth Tigar ) , " The Fresh Prince of Bel - Air " ( starring James Avery ) , and " Ellen " ( with Dan Gauthier ) , as well as two back - to - back episodes of " Dr . Quinn , Medicine Woman " in 1994 ( working with Chad Allen , J . G . Hertzler , and Leland Orser ) . In addition , he played Dr . Diamond in the fourth episode of " The X - Files " , entitled " The Jersey Devil " . Sierra also has several made - for - TV movies to his credit . Among the most notable are : the 1974 " Columbo " segment " Publish or Perish " ( directed by Robert Butler and co - starring Mariette Hartley ) ; " Kenny Rogers as The Gambler : The Adventure Continues " ( 1983 ; with Mitch Ryan ) ; " Her Secret Life " ( 1987 ; with James Sloyan and Cliff DeYoung ) ; " Desperado : Badlands Justice " ( 1989 ; with John Rhys - Davies , James B . Sikking , and Robert O ' Reilly ) ; and " Unspeakable Acts " ( 1990 ; with Mark Harelik , Bebe Neuwirth , and Paul Eiding ) . Films . Sierra ' s first two films opened in the United States in May of 1970 . The first was the comedy / drama " Getting Straight " , in which he played the role of Garcia . This was followed by his role as Verger in 1970 ' s " Beneath the Planet of the Apes " , the first sequel in the successful " Planet of the Apes " science fiction franchise . The former film also featured Jon Lormer and John Rubinstein , while James Gregory had a supporting role in the latter . Jeff Corey appeared in both films . Next , Sierra worked with John Colicos and Nehemiah Persoff in the 1971 drama " Red Sky at Morning " . Sierra and Colicos again worked together in the 1972 western film " The Wrath of God " , which also starred Frank Langella . Sierra had a supporting role in the 1971 western film " Machismo : 40 Graves for 40 Guns " , along with Stanley Adams and Lilyan Chauvin . Following roles in such films as " Pocket Money " ( 1972 ) and " The Thief Who Came to Dinner " ( 1973 ) , Sierra appeared in the acclaimed 1973 film " Papillon " . This film also featured Bill Mumy , William Smithers , Ron Soble , Vic Tayback , and Anthony Zerbe in supporting roles . That same year , Sierra appeared in another film with Anthony Zerbe , " The Laughing Policeman " . Joanna Cassidy also had a role in this film . Sierra played Carlos the bartender in the 1974 disaster film , " The Towering Inferno " . He was also directed by Vincent McEveety in 1974 ' s " The Castaway Cowboy " . His subsequent film credits included " Mean Dog Blues " ( 1978 ; with Marc Alaimo , Gregg Henry , and William Windom ) and " The Prisoner of Zenda " ( 1979 ; with Ian Abercrombie ) . Sierra appeared in two film spoofs from director Jim Abrahams : " Hot Shots ! Part Deux " in 1993 and " Jane Austen ' s Mafia ! " in 1998 . Both of these films featured Andreas Katsulas ; the former had Miguel Ferrer and the aforementioned Mitch Ryan , as well . In John Carpenter ' s " Vampires " ( 1998 ) , Sierra portrayed Father Giovanni , a priest who assisted the film ' s main character , Jack Crow , in destroying vampires before being killed himself . This film also featured Cary - Hiroyuki Tagawa as another member of Crow ' s team . Sierra ' s other film credits during the 1990s include " Deep Cover " ( 1992 ; with Clarence Williams III ) , " Honey I Blew Up the Kid " ( 1992 ; with Ron Canada and Kenneth Tobey ) , " A Low Down Dirty Shame " ( 1994 ; with Salli Elise Richardson ) , and " The Wonderful Ice Cream Suit " ( 1998 ; with Clifton Collins , Jr . ) . Sierra ' s latest film credit was a short called " Vic " , which also featured Richard Herd . Although it was released in 2006 , the film was actually shot in 1998 or 1999 .