In 1938, millions of Americans thought Martians had invaded Earth after a radio broadcast sounded so real that it triggered nationwide panic

On the evening of October 30, 1938, millions of Americans tuned in to what they believed was an ordinary radio broadcast. Instead, many heard a series of urgent news bulletins reporting that Martians had landed in New Jersey and were invading Earth.

The programme was not real. It was Orson Welles' radio adaptation of H. G. Wells' classic science fiction novel The War of the Worlds. Yet its realistic presentation left some listeners convinced the United States was under attack, making it one of the most famous broadcasts in media history.

What was the 1938 War of the Worlds radio broadcast?

The War of the Worlds was a special Halloween episode of The Mercury Theatre on the Air, broadcast live on the CBS Radio Network at 8 pm ET on October 30, 1938.


Directed and narrated by the then-23-year-old Orson Welles, the programme adapted H. G. Wells' 1898 novel into a radio drama designed to sound like a live news broadcast.

Rather than presenting the story as a traditional drama, the programme interrupted what appeared to be a regular music show with increasingly alarming "breaking news" reports, creating the impression that a genuine national emergency was unfolding.

Why did people believe the Martian invasion was real?

The first half of the broadcast closely resembled a real-time news programme.

It began with reports of mysterious explosions on Mars before announcing that an unknown object had crashed on a farm in Grovers Mill, New Jersey.

As the story progressed, fictional reporters described strange creatures emerging from a spacecraft and using a devastating heat ray against police officers and onlookers. Subsequent bulletins claimed the US military had failed to stop the invasion, while a reporter broadcasting from a rooftop in Manhattan described poison gas engulfing New York City before his transmission abruptly ended.

Because the programme had very few commercial breaks, some listeners who tuned in late reportedly missed the introduction explaining that it was a fictional adaptation.

Did the broadcast really cause mass panic?

The 1938 broadcast quickly became known as the programme that caused nationwide panic.

Although newspapers at the time reported that thousands of listeners fled their homes or contacted emergency services believing the invasion was real, later research suggests the scale of the panic was likely exaggerated.

Historians now believe that while some listeners were genuinely frightened or confused, the widespread hysteria often described in popular culture has been overstated.

Nevertheless, the programme remains one of the best-known examples of how realistic media can influence public perception.

How did CBS and Orson Welles respond?

As reports of public concern reached CBS during the live broadcast, there were discussions about whether to interrupt the programme. However, it continued until its scheduled conclusion.

The following day, Orson Welles held a press conference and apologised for any distress caused by the broadcast.

No action was taken against either Welles or CBS, but the incident sparked widespread debate about broadcasting ethics and prompted calls for tighter oversight of radio programming.

How did the broadcast end?

After the dramatic first half, the programme shifted into a more conventional radio drama.

It followed a survivor navigating a world occupied by the Martians before revealing that the alien invaders had ultimately been defeated not by human weapons, but by Earth's microbes, just as in H. G. Wells' original novel.

At the end of the programme, Welles stepped out of character and jokingly compared the broadcast to "dressing up in a sheet and jumping out of a bush and saying 'boo!'", describing it as a Halloween prank.

Why is the 1938 War of the Worlds broadcast still remembered?

More than eight decades later, the broadcast is regarded as a landmark in the history of radio and storytelling.

It transformed Orson Welles into a national figure, showcased the power of immersive media and continues to be studied as an example of how realistic reporting can shape public reaction, particularly during moments of uncertainty.

Inputs from agencies