I, Webb enlisted in the United States Army Air Forces. After washing out of flight training, he applied for and received a hardship discharge, which he legitimately deserved being the primary financial support for his mother and grandmother.

Acting

Following his discharge, he moved to San Francisco to star in his own radio show on ABC's KGO Radio. The Jack Webb Show was a half-hour comedy that had a limited run on ABC radio in 1946. By 1949 he had abandoned comedy for drama, and starred in Pat Novak for Hire, a radio show about a man who worked as an unlicensed private detective. The program co-starred Raymond Burr. Pat Novak was notable for writing that imitated, almost to parody, the hard-boiled style of such writers as Raymond Chandler, with lines such as: "She drifted into the room like 98 pounds of warm smoke. Her voice was hot and sticky--like a furnace full of marshmallows."

Webb's radio shows included Johnny Modero, Pier 23; Jeff Regan, Investigator; Murder and Mr. Malone and One Out of Seven. Webb did all of the voices on One Out of Seven, often vigorously attacking racial prejudice.

His most famous motion picture role was as the combat-hardened Marine Corps drill instructor at Parris Island in the 1957 film The D.I., with Don Dubbins as a callow Marine private. Webb's characterization in this role (Sgt. Jim Moore) would be reflected in much of his later acting.
Dragnet and stardom

Webb had a featured role as a crime lab technician in the 1948 film He Walked by Night, based on the real-life murder of a California Highway Patrolman. The film was done in semidocumentary style with technical assistance provided by Detective Sergeant Marty Wynn of the Los Angeles Police Department. The film gave Webb the idea for Dragnet.

With much assistance from Sgt. Wynn and legendary LAPD chief William H. Parker, Dragnet hit the airwaves in 1949 (running until 1954). It appeared on television from 1951 to 1959 on the NBC network. Webb played Sgt. Joe Friday, and Barton Yarborough co-starred as Sgt. Ben Romero. Yarborough's death early in the show led to his eventual replacement by Ben Alexander as Officer Frank Smith.

Webb was a stickler for attention to detail. He believed viewers wanted "realism" and tried to give it to them. Webb had tremendous respect for those in law enforcement. He often said in interviews that he was angry about the "ridiculous amount" of abuse police were subjected to by the press and the public. He said he intended to perform a service for the police by showing them as low-key working class heroes. Dragnet moved away from earlier portrayals of the police in shows such as Jeff Regan and Pat Novak, which often showed them as brutal and even corrupt.

Despite his reputation for accuracy, Webb wasn't above bending the rules. According to one Dragnet technical advisor, when the advisor pointed out that several circumstances in an episode were extremely unlikely in real life, Webb responded, "You know that, and now I know that. But that little old lady in Kansas will never know the difference." Dragnet became a successful television show in 1952. Barton Yarborough died of a heart attack, and Barney Phillips (Sgt. Ed Jacobs) and Herbert Ellis (Officer Frank Smith) temporarily stepped in as partners. Veteran radio and film actor Ben Alexander soon took over the role of jovial, burly Officer Frank Smith. Alexander was popular and remained a cast member until the show's cancellation in 1959.

Dragnet began with the narration "The story you are about to see is true. Only the names have been changed to protect the innocent." At the end of each show, the trial verdict of the suspect was announced by Hal Gibney. Webb frequently re-created entire floors of buildings on sound stages, such as the police headquarters at Los Angeles City Hall and a floor of the Los Angeles Herald-Examiner.

In Dragnet's early days, Webb continued to appear in movies, notably as the best friend of William Holden's character in the 1950 Billy Wilder film Sunset Boulevard. In 1950, Webb appeared alongside future 1960's Dragnet partner Harry Morgan in the film noir Dark City, which also featured the first screen appearance of a new young actor named Charlton Heston. In contrast to the pair's straight-arrow image in 'Dragnet', Webb played a vicious card-shark in Dark City and Morgan a punch-drunk ex-fighter who tries to talk Heston back into a straight-and-narrow life.

In 1951, Webb introduced a short-lived radio series, Pete Kelly's Blues, in an attempt to bring the music he loved to a broader audience. That show became the basis for a 1955 movie of the same name. However, neither the radio series nor the movie was very successful.

In the early 1960s Webb (along with actor Jeffrey Hunter) formed Apollo Productions! They made the TV series Temple Houston!

In 1963, Webb took over from William T. Orr as executive producer of the ABC detective series 77 Sunset Strip. He brought about wholesale changes in the program and retained only Efrem Zimbalist, Jr., in the role of Stuart Bailey. The outcome was a disaster. Ratings fell and the series was cancelled in its sixth season.

Beginning in early 1967, Webb produced and starred in a new color version of Dragnet for NBC, this time for Universal Television, which packaged all his subsequent shows. Harry Morgan co-starred as Officer Bill Gannon. (Ben Alexander was unavailable, as he was co-starring in Felony Squad on ABC.) The show's pilot, originally produced as a made-for-TV movie in 1966, did not air until 1969. The TV movie was based on the Harvey Glatman serial killings. The TV series ran through 1970. To distinguish it from the original series, the year of production was added to the title (Dragnet 1967, Dragnet 1968, etc.). The revival emphasized crime prevention and outreach to the public. Its attempts to address the contemporary youth-drug culture (such as the Blue Boy episode voted 85th-best TV episode of all time by TV Guide and TV Land) have led certain episodes on the topic to achieve cult status due to their strained attempts to be "with-it", such as Friday grilling Blue Boy by asking him "You're pretty high and far out, aren't you? What kind of kick are you on, son?".

In 1968, in concert with Robert A. Cinader, Webb produced NBC's popular Adam-12, which focused on uniformed LAPD officers Pete Malloy (Martin Milner) and Jim Reed (Kent McCord), which ran until 1975. Webb also performed the classic "Copper Clappers" sketch during an appearance on The Tonight Show where a pokerfaced Joe Friday echoed Johnny Carson's equally-deadpan robbery report in which all the details started with "Cl" or least the letter C.

In the 1970s Webb began to expand his Mark VII Limited into other shows. The most successful of his 1970s efforts was Emergency!, which portrayed the fledgling paramedic program of the L.A. County Fire Department. The show become a huge success, running from 1972–79, with ratings occasionally even topping its time slot competitor, All in the Family. Webb cast his ex-wife, Julie London, as well as her second husband and Dragnet ensemble player Bobby Troup, as nurse Dixie McCall and Dr. Joe Early. There was even a cartoon spin-off, Emergency+4.

Personal life

Webb's personal life was better defined by his love of jazz than his interest in police work. His life-long interest in the cornet and racially tolerant attitude allowed him to move easily in the jazz culture, where he met singer and actress Julie London. They married in 1947 and had two children. They later divorced, and Webb would marry three more times.

Webb's first marriage to Julie London ended in 1954. Subsequently, he married Dorothy Towne in 1955, divorcing in 1957, former Miss USA Jackie Loughery (to whom he was married from 1958 to 1964), and Opal Wright, who married him in 1980 and was his widowed by his death in 1982. He had two daughters with Julie London: Stacy (1950–1996) and Lisa (born 1952). Stacy Webb authorized and collaborated a book, Just the Facts, Ma'am; The Authorized Biography of Jack Webb, Creator of Dragnet, Adam-12, and Emergency, by Daniel Moyer and Eugene Alvarez. It was published in 1999. Stacy did not live to see the publication of the book, having been killed in a car accident three years earlier.

Death

Jack Webb began working on scripts for a revival of Dragnet with Kent McCord as his partner. However, he died of a heart attack in 1982 at the age of 62.

He was interred in the Forest Lawn, Hollywood Hills Cemetery in Los Angeles, and was given a funeral with full police honors. On Webb's death Chief Daryl Gates announced that badge number 714 which was used by Joe Friday in Dragnet would be retired.[clarification needed] Mayor Tom Bradley of Los Angeles ordered all flags lowered to half-staff in Webb's honor for a day, and Webb was buried with a replica LAPD badge bearing the rank of Sergeant, and the number 714.

Webb has two Stars on the Hollywood Walk of Fame: for radio at 7040 Hollywood Boulevard, and for television at 6728 Hollywood Boulevard.