Question: What show is the series that contains the episode "SHell" spun off from?

Context articles: List of The Andy Griffith Show episodes
Ghost in the Shell: The New Movie
Ghost in the Shell (manga)
Shells (Angel)
Tragedy in a Temporary Town
Shell Chateau
Shell Dockley
Latouchella
Plectronoceras
Angel (1999 TV series)

This is a list of episodes from the CBS television comedy "The Andy Griffith Show".
 The first episode aired on October 3, 1960 and the final episode aired on April 1, 1968.
 There were 249 episodes in all, 159 in black and white (seasons 1–5) and 90 in color (seasons 6–8).
 The series was spun off from "The Danny Thomas Show", where Sheriff Andy Taylor was introduced in the episode, "Danny Meets Andy Griffith", which first aired on February 15, 1960.
Ghost in the Shell: The New Movie (Japanese: 攻殻機動隊 新劇場版 , Hepburn: Kōkaku Kidōtai: Shin Gekijōban , lit.
 "Mobile Armored Riot Police: The New Theatrical Edition") , also known as Ghost in the Shell: Arise − The Movie or New Ghost in the Shell, is a 2015 Japanese animated science fiction action spy thriller film directed by Kazuya Nomura.
 A continuation of the "" story arc, "The New Movie" is the latest film in the series produced by Japanese studio Production I.G., and the first feature since "" in 2006.
 The film is a continuation to the plot of the "Pyrophoric Cult" episode of "Arise", and ties up loose ends from that arc.
Ghost in the Shell, known in Japan as Mobile Armored Riot Police (Japanese: 攻殻機動隊 , Hepburn: Kōkaku Kidōtai ) , is a "seinen" manga series written and illustrated by Masamune Shirow, which spawned the media franchise of the same name.
 The manga, first serialized in 1989 under the subtitle of "The Ghost in the Shell", and later published as its own "tankōbon" volumes by Kodansha, told the story of the fictional counter-cyberterrorist organization Public Security Section 9, led by protagonist Major Motoko Kusanagi, in the mid 21st century of Japan.
 "Ghost in the Shell 2: Man-Machine Interface" was the sequel work which follows the story of Motoko after merging with the Puppeteer.
 The last volume, "Ghost in the Shell 1.5: Human-Error Processor", contains four separate cases.
"Shells" is episode 16 of season 5 in the television show "Angel".
Tragedy In A Temporary Town was the a 1959 episode of the Australian anthology drama show "Shell Presents" starring Michael Pate.
 It was filmed "live" in Melbourne, then recorded and broadcast in Sydney.
 It was the third episode of "Shell Presents" and the first shot in Melbourne.
Shell Chateau was a musical variety radio series heard on NBC from 1935 to 1937.
 Sponsored by Shell Oil, the hour-long program, sometimes called The Shell Show, was broadcast on Saturday evenings at 9:30pm.
Michelle "Shell" Dockley is a fictional character from the award-winning prison drama series "Bad Girls".
 She is portrayed by British actress Debra Stephenson.
 Shell was one of the lead characters in the series.
 Shell appeared from the first episode in Series 1 until the last episode of Series 3, and returned for the first four episodes of Series 5.
Latouchella is an extinct genus of marine invertebrate animal, that is considered to be a mollusk and which may be a sea snail, a gastropod.
 It is a helcionellid from the Tommotian epoch of what is now Siberia.
 Its tightly-coiled, spiral shell contains a number of low "walls" running up the front surface of the interior; these would have directed water currents within its shell.
 Between these walls are a series of furrows, parallel to the shell's aperture, giving casts of the internal structure the appearance of a railway line, with sleepers (created by furrows) tying together paired rails that run towards the apex of the shell.
Plectronoceras is the earliest known shelly cephalopod, dating to the Late Cambrian.
 None of the fossils are complete, and none show the tip or opening of the shell.
 Approximately half of its shell was filled with septa; 7 were recorded in a 2 cm shell.
 Its shell contains transverse septa separated by about half a millimetre, with a siphuncle on its concave side.
 Its morphology matches closely to that hypothesised for the last common ancestor of all cephalopods.
Angel is an American television series, a spin-off from the television series "Buffy the Vampire Slayer".
 The series was created by "Buffy"' s creator, Joss Whedon, in collaboration with David Greenwalt.
 It aired on The WB from October 5, 1999, to May 19, 2004, consisting of five seasons and 110 episodes.
 Like "Buffy", it was produced by Whedon's production company, Mutant Enemy.