Question: Which film did the voice actor who plays Sam Eagle in the television show "The Muppet Show" co-direct with Jim Henson?
Context: Sam Eagle is a Muppet character originating from the television show "The Muppet Show", where he was performed by Frank Oz.  Sam has appeared in every Muppet film; as himself in "The Muppet Movie", "The Great Muppet Caper", "The Muppets Take Manhattan", "Muppets from Space", and "The Muppets", as well as the Head Schoolmaster in "The Muppet Christmas Carol," Samuel Arrow in "Muppet Treasure Island" and a CIA agent in "Muppets Most Wanted."  He also appears in the television series, "The Muppets." Steven Lawrence "Steve" Whitmire (born September 24, 1959) is an American puppeteer who has worked on The Muppets and "Sesame Street".  Beginning his involvement with the Muppets in 1978, Whitmire inherited the roles of Kermit the Frog and Ernie, after Jim Henson's death in 1990; he performed the characters until 2016 and 2014, respectively.  As part of the Muppet cast, he has appeared in multiple feature films and television series, performing a variety of characters on "The Muppet Show", "Sesame Street", and "Fraggle Rock" and during such occupations has worked for the Jim Henson Company, Sesame Workshop, and the Muppets Studio. Dr. Teeth and The Electric Mayhem is a Muppet rock house band that debuted on "The Muppet Show".  Following "The Muppet Show", they appeared in various Muppet movies and television specials and have also recorded album tracks and covered numerous songs.  Dr. Teeth and Animal were designed by Jim Henson while the rest of the original band members were designed by Michael K. Frith.  They made their debut in 1975's "" and the pilot for "The Muppet Show". Muppets Tonight is an American live-action/puppet family-oriented television series created by Jim Henson Productions and featuring The Muppets.  Much like the "MuppeTelevision" segment of "The Jim Henson Hour", the show was a continuation of "The Muppet Show", set in a television studio, rather than a theater. The Muppets Take Manhattan is a 1984 American musical comedy film directed by Frank Oz.  It is the third of a series of live-action musical feature films starring Jim Henson's Muppets with special appearances by Art Carney, James Coco, Dabney Coleman, Gregory Hines, Linda Lavin, and Joan Rivers.  The film was produced by Henson Associates and TriStar Pictures, and was filmed on location in New York City during the summer of 1983 and released theatrically the following summer.  It was the first film to be directed solely by Oz (who also performs Sam the Eagle, Fozzie Bear, Miss Piggy, and Animal), as he previously co-directed "The Dark Crystal" with Henson. The Muppets Celebrate Jim Henson is a one-hour special that aired on CBS on November 21, 1990.  The program was a tribute to Muppet creator Jim Henson, who had died earlier in 1990 due to toxic shock syndrome caused by a streptococcus infection, and featured characters from "The Muppet Show", "Fraggle Rock", and "Sesame Street". The Great Muppet Caper is a 1981 British-American mystery musical comedy film directed by Jim Henson, marking his feature directorial debut.  The film is about the Muppets who must travel to London to stop a jewel heist.  It is the second of a series of live-action musical feature films, starring Jim Henson's Muppets.  The film was a British-American venture produced by Henson Associates and ITC Entertainment, and originally released by Universal Pictures on 26 June 1981.  It is also the only Muppet feature film directed by Henson.  Shot in Great Britain in 1980, the film was released shortly after the final season of "The Muppet Show". The Muppet Movie is a 1979 musical road comedy film and the first theatrical film featuring the Muppets.  Directed by James Frawley and produced by Jim Henson, the film's screenplay was conceived by "The Muppet Show" writers Jerry Juhl and Jack Burns.  An American and British venture produced by Henson Associates and ITC Entertainment between the first half and the second half of "The Muppet Show"' s third season, the film depicts Kermit the Frog as he embarks on a cross-country trip to Hollywood, California.  Along the way, he encounters several of the Muppets—who all share the same ambition of finding success in professional show business—while being pursued by Doc Hopper, an evil restaurateur with intentions of employing Kermit as a spokesperson for his frog legs business. Kermit the Frog is a Muppet character and Jim Henson's most well-known creation.  Introduced in 1955, Kermit serves as the straight man protagonist of numerous Muppet productions, most notably "Sesame Street" and "The Muppet Show", as well as in movies, specials, and public service announcements through the years.  Henson originally performed Kermit until his death in 1990; Steve Whitmire performed Kermit from that time up until his dismissal from the role in 2016.  Kermit is currently performed by Matt Vogel.  He was also voiced by Frank Welker in "Muppet Babies" and occasionally in other animation projects. Don Sahlin (June 19, 1928 in Stratford, Connecticut – February 19, 1978 in New York City) was a Muppet designer and builder who worked for Jim Henson from 1962 to 1977.  His first creation for Jim Henson was Rowlf the Dog, which he built in 1962 for a series of Purina Dog Chow commercials.  Don would go on to design and build most of the Muppet characters, including Bert and Ernie, Grover, and Cookie Monster among others.  His character designs are often recognizable for their spheroid heads partially bisected to create large mouths.  Although always based on sketches by Jim Henson, the Muppet founder regularly stated that it was Don who should be credited with creating the actual Muppet "look", and Henson later had a bench in London dedicated to his memory.  The series finale of "Fraggle Rock" is also dedicated to him.  After all the regular credits have been shown, a special credit appears which reads "This show is for Don Sahlin".
Answer: The Dark Crystal