21 Jump Street is an American police procedural crime drama television series that aired on the Fox Network and in first run syndication from April 12, 1987, to April 27, 1991, with a total of 103 episodes. The series focuses on a squad of youthful-looking undercover police officers investigating crimes in high schools, colleges, and other teenage venues. It was originally going to be titled Jump Street Chapel, after the deconsecrated church building in which the unit has its headquarters, but was changed at Fox's request so as not to mislead viewers into thinking it was a religious program.

Created by Patrick Hasburgh and Stephen J. Cannell, the series was produced by Stephen J. Cannell Productions in association with 20th Century Fox Television. The show was an early hit for the fledgling Fox Network, and was created to attract a younger audience. The final season aired in first-run syndication mainly on local Fox affiliates. It was later rerun on the FX cable network from 1996 to 1998.

Channing Matthew Tatum (born April 26, 1980) is an American actor, film producer, dancer, and former model, best known for his roles in Step Up (2006), G.I. Joe: The Rise of Cobra (2009), Dear John (2010), The Vow (2012), and 21 Jump Street (2012). He has also appeared in films such as Coach Carter (2005), She's the Man (2006), A Guide to Recognizing Your Saints (2006), and Fighting (2009). While mostly known for his dramatic performances in Dear John and The Vow, he has since ventured into more comedic roles.

Tatum was born and raised in Cullman, Alabama. His mother, Kay (née Faust), is an airline worker, and his father, Glenn Tatum, worked in construction. His ancestry includes Irish, French and Native American. Tatum's family moved to Mississippi when he was six, and he grew up in the bayous near the Mississippi River, where he lived in a rural setting.

Tatum was athletic while growing up, playing football, soccer, track, baseball, and performing martial arts; he has said that "girls were always [his] biggest distraction in school." As a child, he practiced wuzuquan kung fu under the lineage of 10th dan Grandmaster Chee Kim Thong. Tatum spent most of his teenage years in the Tampa, Florida area and initially attended Gaither High School before going to Tampa Catholic High School. He graduated in 1998 and was voted most athletic. Afterward, Tatum attended Glenville State College in Glenville, West Virginia on a football scholarship, but dropped out. He returned home and started working odd jobs. US Weekly reported that around this time Tatum began working as a stripper at a local nightclub, under the name "Chan Crawford." In 2010, he told an Australian newspaper that he would like to make a movie about his experiences as a stripper. He later moved to Miami, where he was discovered on the street by a model talent scout.

Jonah Hill (born Jonah Hill Feldstein; December 20, 1983) is an American actor, producer, screenwriter, and comedian, best known for his roles in Superbad (2007), Knocked Up (2007), Funny People (2009), Get Him to the Greek (2010), Moneyball (2011), and 21 Jump Street (2012). He made his theatrical debut in I Heart Huckabees (2004), alongside Jason Schwartzman and Dustin Hoffman. He also co-created and starred in the animated comedy Allen Gregory on FOX. Hill was first nominated for a Teen Choice Award for his role in Accepted (2006) as Sherman Schrader, and for his role in Moneyball he was nominated for an Academy Award for Best Supporting Actor.

Hill was born in Los Angeles, California, the son of Sharon Lyn (née Chalkin), a costume designer and fashion stylist, and Richard Feldstein, a tour accountant for Guns N' Roses. Hill was raised Jewish. His parents were originally from Long Island, New York, and the family vacationed in the Catskills. He attended The Center for Early Education, Brentwood School and then Crossroads School, in Santa Monica. After graduating from high school, Hill left California to attend The New School, where he studied music and sport.

Ice cubes are small, roughly cube-shaped pieces of ice, conventionally used to cool beverages. Ice cubes are sometimes preferred over crushed ice because they melt more slowly; they are standard in mixed drinks that call for ice, in which case the drink is said to be "on the rocks."

Ice cubes that are crushed or sheared into irregularly-shaped flakes may add an interesting aesthetic effect to some cocktails. Crushed ice is also used when faster cooling is desired, since the rate of cooling is governed by the number and average radius of the ice particles.

Melting ice cubes sometimes precipitate white flakes, commonly known as "floaties". This is calcium carbonate which is present in many water supplies and is completely harmless.^{[citation needed]}

American physician and humanitarian John Gorrie built a refrigerator in 1844 with the purpose of cooling air. His refrigerator produced ice which he hung from the ceiling in a basin. Gorrie can be considered the creator of ice cubes, but his aim was not to cool drinks: he used the ice to lower the ambient room temperature. During his time, a dominant idea was that bad air quality caused disease. Therefore, in order to help treat sickness, he pushed for the draining of swamps and the cooling of sickrooms.

Robert Allen "Rob" Riggle, Jr. (born April 21, 1970) is an American actor, comedian and United States Marine Corps Reserve officer. He is best known for his work as a correspondent on Comedy Central's The Daily Show from 2006–2008, as a cast member on Saturday Night Live from 2004–2005, and for his comedic roles in films such as The Hangover, The Other Guys, The Lorax, 21 Jump Street, The Goods: Live Hard, Sell Hard, and Step Brothers.

Riggle was born in Louisville, Kentucky and raised in Overland Park, Kansas, where he attended Shawnee Mission South High School. He later graduated from the University of Kansas, in 1992, with a B.A. in Theater and Film, and is a member of the Phi Gamma Delta fraternity. He went on to earn a Master of Public Administration degree from Webster University in 1997.

Riggle is currently a Lieutenant Colonel in the United States Marine Corps Reserve and served in Liberia, Kosovo, and Afghanistan. He is currently a public affairs officer with the New York City Public Affairs unit and is a recipient of the Combat Action Ribbon. Riggle joined the Marines in 1990 after getting his pilot's license, intending to become a Naval Aviator, but left flight school in order to pursue his comedy career. He has referred to his military experiences on The Daily Show, often when acting as the show's "Military Analyst", publicly stating he could kill any other member of the show.