TLDR: Dragnet became the template every television cop show since has copied in some form. Behind that template was a revolving door of partners for Sergeant Joe Friday, one forced by a real death in the middle of filming, and a creator so committed to the role that the LAPD retired his badge number when he died.
Dragnet began as a radio series in 1949 before Jack Webb brought it to television in 1951, playing LAPD Sergeant Joe Friday across both.
The show grew out of a real conversation between Webb and LAPD Technical Advisor Sergeant Marty Wynn, who suggested a series built around authentic police procedure after Webb had played a similar role in the 1948 documentary-style film He Walked by Night.
Webb took that suggestion seriously, riding along on night patrols with Wynn, attending police academy courses, and later working directly with LAPD Detective Galindo to adapt real case details into scripts.
The show’s stated commitment to authenticity became so convincing that, according to at least one account, the LAPD itself used episodes for training purposes decades later.
He Took the Role So Seriously the LAPD Retired His Badge
Webb’s commitment to Dragnet extended well beyond research, and the LAPD’s own recognition of him after his death reflects just how far that commitment went.
You can read the complete story of his radio beginnings, his unusual honors, and his 1982 death in our dedicated piece on Jack Webb.
Friday’s First Partner Died in the Middle of Filming
Barton Yarborough played Friday’s original radio and television partner, Detective Ben Romero, until he suffered a fatal heart attack during production of the show’s first television season.
Rather than recast the role outright, Webb had the writing staff work Romero’s death into the storyline itself, then rotated Friday through several temporary partners on screen while the production scrambled to adjust.
That real disruption also affected the show’s release schedule, forcing Season 2 to air on an unusual alternating-week basis rather than the standard weekly format most series used at the time.
His Eventual Replacement Sold Ford Cars on the Side
Ben Alexander eventually settled into the role of Officer Frank Smith, Friday’s steadiest and best-remembered partner, appearing in 255 episodes across the show’s original run through 1959.
Alexander had actually been a child actor decades earlier, appearing in D.W. Griffith’s Hearts of the World and later earning strong notices as an adult in 1930’s All Quiet on the Western Front, before a quieter career led him back to Webb’s show.
Off screen, Alexander ran two real Ford dealerships, one in Highland Park and another in San Francisco, for most of the years he spent on the show.
When Webb revived Dragnet in 1966, he wanted Alexander back, but Alexander had already signed on to play a different police sergeant on ABC’s Felony Squad.
He died of a heart attack at his Los Angeles home on July 5, 1969, at age 58, discovered by his wife and children returning from a camping trip.
His Actual Replacement Went On to Even Bigger Fame Elsewhere
Harry Morgan stepped into the role of Officer Bill Gannon for the 1967 revival, giving Friday his final and most enduring television partner.
Morgan’s Dragnet years turned out to be a mere prelude to his most famous role: he joined M*A*S*H in its fourth season as Colonel Sherman T. Potter, a part that won him a 1980 Emmy and became, in his own words, “practically me.”
Morgan’s commitment to Dragnet mattered enough that when Webb tried to plan a third revival in 1982, Morgan’s ongoing work on M*A*S*H and its spinoff AfterMASH kept him from returning at all.
Dragnet, Frequently Asked Questions
Why did Dragnet keep changing partners for Joe Friday?
The original partner, Barton Yarborough, died of a heart attack during production of the first television season, forcing the show to rotate through temporary partners before settling on Ben Alexander as Officer Frank Smith.
How did Ben Alexander die?
He died of a heart attack at his Los Angeles home on July 5, 1969, at age 58, discovered by his wife and children upon returning from a camping trip.
Did Harry Morgan appear in other famous shows besides Dragnet?
Yes, he went on to play Colonel Sherman T. Potter on M*A*S*H starting in its fourth season, a role that won him a 1980 Emmy Award and became his most famous part.
Was Dragnet based on real police cases?
Yes, creator Jack Webb worked closely with LAPD advisors, including Sergeant Marty Wynn and Detective Galindo, adapting real case details into scripts while changing names to protect the people involved.
