Dennis Chase (21 Beacon Street)

Created by Leonard Heideman

Dennis and Lola share a moment.

Quiet, humble DENNIS CHASE (good name, that, if maybe a trifle too on-the-nose, for a P.I.) was the mild-mannered hero of 21 Beacon Street, a short-lived television show on NBC that sounded like a 77 Sunset Strip clone, but wasn’t.

The bow tie might have been a clue.

Instead, it followed the high-tech (for 1959) Chase Detective Agency that specialized in on cases the cops hadn’t been able to solve–often with their blessing. Possibly because after cracking the case Chase and his team always called the police in to make the arrest. Despite his last name, he rarely chased down any of the bad guys himself.

Chase utilized all the latest gadgets, and worked out of his office at–you guessed it–21 Beacon Street, in an unnamed city, although presumably it’s Boston.

His “team” consisted of  Brian (a young, ambitious law student), Jim (a jack-of-all-trades with a particular facility for electronics and disguises) and, of course, the obligatory attractive secretary/girlfriend Lola.  But Lola was there for more than comic relief–she  just happened to have a Ph.D and also served as Dennis’ lab assistant.

A summer replacement for NBC’s popular The Tennessee Ernie Ford Show, and in some ways seen as a forerunner to the 1960s crime-action series Mission: Impossible (Beacon creators later sued M.I. producers for plagiarism), 21 Beacon Street was the first TV series produced by Filmways Pictures Corporation, which would later put out such fan favorites as The Beverly Hillbillies, Green Acres and The Addams Family, among many others.

While former Warner Bros. leading man Dennis Morgan did make occasional guest appearances on television, 21 Beacon Street was his first, and only, shot to star in his own TV series. The 13 episodes in this complete collection include such familiar guest stars as

Meticulous to a fault, Dennis would devise elaborate schemes to solve the case, which he and his team would then carry out, before dropping a dime on the miscreants.

It was those elaborate schemes, in fact, and the use of all those high tech gizmos and gimmicks (Truth serum! Computers! Electronic bugs! Hidden cameras! Wiretapping! Radio-transmitting eyeglasses! Disguises!) that led to 21 Beacon Street often being considered a forerunner of Mission Impossible, which came along seven years later. So much so that eventually the creators of 21 Beacon Street sued Bruce Geller of Mission Impossible for plagiarism. The suit was settled out of court.

The show was the 1959 summer replacement for The Tennessee Ernie Ford Show on NBC, and although it fared relatively well with critics and was supposedly the highest rated replacement series that year, it failed to find much of network support, and wasn’t renewed, although it was later rerun on rival network ABC (along with three final unaired episodes) in the second half of the 1959-60 season.

And that was that. The show seems to have slipped through the cracks, never to be seen again. Literally. Not only is it forgotten, but it seems it may be lost as well. No copies, as far as I can tell, have ever surfaced. Too bad–this might have been an interesting one to see.

Hopefully, the scripts were a little more imaginative than the naming of the characters–or it was the most extraordinary example of coincidental casting in the history of television. Really! Dennis Morgan played a character named Dennis, Brian Kelly played a character named Brian and James Maloney played a character named Jim?

What are the odds?


21 Beacon Street‘s creator, Leonard Heideman, also served as the story editor, a position he’d previously held for Flight, an American television anthology series that aired in syndication from 1958 to 1959. He assumed the same role for the top ten western, Bonanza. But ever ambitious, he walked away from the job  after less than a year, and began to write for Checkmate, a big-budget detective series created by Eric Ambler, confident his career was on the rise.  It wasn’t, and the mounting stress of professional, financial and domestic difficulties were piling up. Eventually they would lead to a psychotic episode, and in February 1963 he stabbed his wife to death. Declared unfit for trial, he was committed to a mental hospital and stayed there for fourteen months, before being released. He was found not guilty of his wife’s murder, by reason of insanity, and changed his name to Laurence Heath, and went back to writing for television, where he ended up writing a couple of dozen episodes of… Mission Impossible. He went on to write episodes for Hawaii Five-OMannixThe InvadersLancer and Murder, She Wrote. He committed suicide in 2007.


    (1959, NBC)
    13 30 minute episodes
    Black & white
    Writers:  Leonard Heideman, Robert C. Dennis, David Chandler, Fenton Earnshaw, Tom Gries, Jack Kelsey, Jack Laird, John Meredyth Lucas
    Story Editor: Leonard Heideman
    Directors: Maurice Geraghty, Jean Yarbrough, Harold D. Schuster
    Produced by Al Simon
    A Fairways Production
    Starring Dennis Morgan as DENNIS CHASE
    With Joanna Barnes as Lola
    Brian Kelly as Brian
    and James Maloney as Jim
    Guest stars: DeForrest Kelley, Jerry Paris, Whit Bissell, Anthony Caruso, Steve Brodie, Ted DeCorsia, Barney Phillips, Paul Bryar, Paul Dubov, Harry Bellaver, Henry Corden, Sally Fraser, John Hoyt, Myron Healey, Jean Willes, Alberto Morin, Paul Richards, Joan Taylor, Cyril Delevanti

    • SEASON ONE Buy the DVD
    • “The Rub Out” (July 2, 1959)
    • “Safety Deposit” (July 9, 1959)
    • “The Payoff” (July 16, 1959)
    • “Double Vision” (July 23, 1959)
    • “The Swindle” (July 30, 1959)
    • “The Execution” (August 6, 1959)
    • “The Break-In” (August 13, 1959)
    • “The Trojan Horse” (August 20, 1959)
    • “The Hostage” (August 27, 1959)
    • “The Trap” (September 3, 1959)
    • “Dilemma” (March 6, 1960, on ABC)
    • “Close Call” (March 13, 1960, on ABC)
    • “Nothing is Impossible” (March 13, 1960, on ABC)



  • August 10, 2021
    THE BOTTOM LINE: This late 50s PI show is now almost totally forgotten, but it begat MISSION IMPOSSIBLE. Plus, it had… bow ties! Anyone remember this?
Respectfully submitted by Kevin Burton Smith.

2 thoughts on “Dennis Chase (21 Beacon Street)

  1. I’ve become very obsessed with inspirations lately, like when one movie is based on another one, or a movie inspires a TV series. I put this show on my “wanted” list some time, ago, based on what I read here on this site, never really expecting to be able to knock it off.


    Imagine my shock when, 2 weeks ago, I found out this was put out on DVD just 3 months ago!!! It immediately jumped to the top of my “wanted” list. I JUST got it in the mail today. WOW!!! I just watched the first episode. Man, I REALLY enjoyed this thing.

    It’s pretty clear that Classicflix did not bother remastering the sound on this (lots of hiss), but the picture is pretty clear. You know what? This DOES remind me of MISSION: IMPOSSIBLE. Only in a half-hour fomat. I used to love half-hour adventure shows. I think it’s a shame nobody does them anymore.

    In the last couple weeks, I’ve seen RIFIFI (1955), THE LEAGUE OF GENTLEMEN (1960) and now this. When I’m done with this, I’ll be going after TOPKAPI (1964), and then– the 1st season of MISSION: IMPOSSIBLE. I got hooked on the 2nd season back in 1967, and for decades, never realized that Peter Graves’ “Jim Phelps” was a replacement. I’ve never seen season 1! I can’t wait. Truthfully… I haven’t looked yet. If there’s a “complete series” box– I’ll be going after THAT. Much easier.

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