999: What Happened Next vs World's Most Notorious Killers
World's Most Notorious Killers is the older of the two (2024 against 2026). Both are crime, documentary shows, so they suit a similar mood.
999: What Happened Next
World's Most Notorious Killers| 999: What Happened Next | World's Most Notorious Killers | |
|---|---|---|
| Audience score | ★ 0.0/10 | ★ 8.0/10 |
| Year | 2026 | 2024 |
| Seasons | 2 | 1 |
| Genres | Crime, Documentary | Crime, Documentary |
| Country | GB | – |
| Creator / director | – | – |
| Main cast | Steffan Rhodri | – |
Synopsis
999: What Happened Next
Every three seconds, a 999 call is made to the police. But not every call is as it seems. This series follows the investigators hunting for the truth and bringing the guilty to justice.
World's Most Notorious Killers
Discover the chilling stories of five renowned international murder cases, featuring firsthand accounts from individuals close to each case and those seeking justice.
Where to watch
Where to watch 999: What Happened NextWhere to watch World's Most Notorious Killers
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