Podcast Summary: Harold's Old Time Radio

Episode: 33_half_moon_street_1965-06-10_a_bag_of_coal_for_mr_lazenby
Release Date: February 15, 2026
Host: Harold's Old Time Radio

Overview

This episode features another installment of 33 Half Moon Street, a classic detective radio drama from 1965. In “A Bag of Coal for Mr. Lazenby,” private detective Aubrey Mason and his trusted assistant, David Cannon, are drawn into an industrial mystery involving sabotaged coal deliveries, a remote factory, and a client desperate to fulfill a lucrative contract. The team’s mission is complicated by apparent industrial espionage, misdirection, and a surprising revelation about the true culprit.

Key Discussion Points & Plot Breakdown

1. A Desperate Client at Assignments Unlimited

[00:32–03:26]

• Mr. Lazenby seeks urgent assistance from Mason for his factory in Cumberland, which is on the verge of halting production due to a lack of coal.
  • “Lorry drivers, that's what I need. ...the factory is situated up in the fowls. ...if I don't have coal, I can't keep the machines working. And I've only got three days supply left.” — Mr. Lazenby (01:52–02:19)
• A series of suspicious accidents has befallen the coal lorries, raising concerns of sabotage.
• With a railway strike crippling other transport options, Lazenby turns to Assignments Unlimited for both a skilled driver and investigative help.

2. Cannon Takes the Case

[03:26–05:13]

• Detective Mason assigns David Cannon to pose as a lorry driver, ship coal to the factory, and discreetly uncover any foul play.
• Cannon travels to Carlisle, the nearest rail station, where he is met by Lazenby.
  • “Lazenby's factory appears to be on the top of a mountain. Further, it appears that somebody is trying to do him down with his transport. It's up to you to find out who's trying to do who.” — Mason (04:24–04:35)

3. Peril On The Road and First Suspicions

[05:13–08:13]

• Lazenby explains his factory’s unique position and its role in producing an indestructible plastic critical to large contracts (notably with Delta Aircraft Corporation).
• The 10-mile stretch to the factory has been the site of repeated, unusual accidents — “looking to be alive” after one such crash.
• Cannon deduces someone may be sabotaging the transports:
  • “You mean you think somebody's trying to sabotage you?” — Cannon (05:50)
  • “There’s something going on that I don't understand… not a series of mishaps, as has happened to me just lately.” — Lazenby (06:37)

4. Sabotage on the Mountain

[09:06–11:10]

• During a delivery, Cannon’s lorry breaks down. He discovers the sump plug is missing (the engine’s oil has been drained)—clear evidence of deliberate sabotage.
  • “No plug on the sump. No plug means no oil. ...Somebody's trying to do something to somebody.” — Cannon (09:48)

5. Enter Ms. Masters

[11:10–13:48]

• Ms. Masters, from local haulage contractor Fellside Haulage, happens by and offers Cannon a ride, leading to a revealing conversation:
  • Ms. Masters claims her firm was never asked by Lazenby to help with coal deliveries and would be happy to do so.
    • “He hasn't asked us, Mr. Cannon. He’d be only too pleased to help him. Very pleased, in fact.” — Ms. Masters (13:31)
  • This directly contradicts Lazenby’s earlier claim that every contractor refused due to full bookings or strike.

6. Cracks in the Story

[14:25–17:38]

• Cannon confronts Lazenby with the discrepancy. Lazenby says that when he last asked, Masters’ contractors were fully booked; now, apparently, they no longer are.
• Lazenby reveals the stakes: his “tunnelathene” plastic could revolutionize industries, and his entire business depends on fulfilling the Delta contract.
• Lazenby is under pressure:
  • “If I don't [deliver], I'm in trouble.” — Lazenby (17:04)
• Cannon is put in charge of a major overnight coal haul amid tensions and with few trucks still operational.

7. Nighttime Intrigue and a Twist

[17:58–24:30]

• At the yard, Cannon spots Ms. Masters in suspicious circumstances. Her hands are covered in oil, prompting accusations from Cannon:
  • “Your hands, Ms. Masters, they're covered in oil. ...Opposition haulage who wants Lazenby with oil all over your hands. That won't do.” — Cannon (21:17–21:32)
• Ms. Masters protests her innocence and is escorted to see Lazenby.
• The real twist: Cannon discovers Lazenby himself sabotaging his own truck, caught in the act of sawing the brake fluid pipes under cover of night.
  • “Out you come, whoever you are.” — Cannon (22:42)
  • “When Cannon caught him, he was sawing through the brake fluid pipes. ...Why should he want to sabotage his own transport, you may ask? But it was really very simple…” — Narrator (23:00–23:45)

8. The Motive Revealed

[23:45–24:30]

• Narrator Mason explains:
  • Lazenby has a world-patented material but is locked into an exclusive contract with Delta.
  • Boeing offers Lazenby double—his only escape is Delta cancelling due to non-delivery. Thus, he sabotages his own transports hoping to force such a default.
  • Assignments Unlimited exposes him, leading to Lazenby’s arrest and conviction.
    • “Lazenby got a stiff jail sentence and another file closed on what I called a bag of coal.” — Narrator / Mason (24:20–24:30)

Memorable Quotes & Exchanges

• “That's the usual reason for people coming to see me. ...How can we help?” — Detective Mason (01:48)
• “I also wanted to find out who is trying to break my business.” — Mr. Lazenby (03:11)
• “Now, can you help me at all? ...Is there anybody you can think of that might want to see you down?” — Cannon, pressing Lazenby (15:44–16:00)
• “Your hands, Ms. Masters, ...covered in oil. ...That won't doom as much. Masters, you've got a little explaining to do to Mr. Lazenby. Now, do you come quietly or do I have to carry you?” — Cannon (21:17–21:41)
• “But it was really very simple. Lazenby was bound under a tight contract... [he sabotaged] his own transport. ...Lazenby got a stiff jail sentence and another file closed...” — Mason wraps up the case (24:00–24:30)

Notable Scenes & Timestamps

• Client Introduction / Mystery Set-Up: 00:32–03:26
• Cannon Sent to Cumberland: 03:26–04:47
• Cannon Meets Lazenby & Learns of Industrial Espionage: 05:13–07:03
• First Sabotage Encounter (Sump Plug): 09:06–09:48
• Cannon’s Ride with Ms. Masters: 11:10–13:43
• Revelation of Falsehoods (calling out inconsistencies): 14:25–14:48
• Nighttime Stakeout, Accusing Ms. Masters: 20:28–21:48
• Caught in the Act—Lazenby Exposed: 22:42–24:30

Conclusion

This tightly plotted episode, brimming with 1960s radio drama flair, delivers a robust whodunit with a twist: the villain is not the rival contractor as suspected, but the client himself. The script balances suspense, dry wit, and social observation, revived here on Harold’s Old Time Radio. For fans of detective radio, this episode encapsulates all the hallmarks—red herrings, clever dialogue, and a clever reversal—making it a must-listen for old-time mystery enthusiasts.