General Mayhem: The Killing of Brigadier J vs Not On the Heep: The Heavy Metal Saga of Lee Kerslake
Not On the Heep: The Heavy Metal Saga of Lee Kerslake has the higher audience score (10/10 against 6.5/10 for General Mayhem: The Killing of Brigadier J). General Mayhem: The Killing of Brigadier J is the shorter watch at 1h 29m compared with 1h 34m. Not On the Heep: The Heavy Metal Saga of Lee Kerslake is the older of the two (2023 against 2026). Both are documentary movies, so they suit a similar mood.
General Mayhem: The Killing of Brigadier J2026
VS 
Not On the Heep: The Heavy Metal Saga of Lee Kerslake2023
| General Mayhem: The Killing of Brigadier J | Not On the Heep: The Heavy Metal Saga of Lee Kerslake | |
|---|---|---|
| Audience score | ★ 6.5/10 | ★ 10.0/10 |
| Year | 2026 | 2023 |
| Length | 1h 29m | 1h 34m |
| Genres | Documentary | Documentary, Music |
| Country | Singapore | – |
| Director | Rob Sixsmith | Tayla Tracey Goodman |
| Main cast | – | Eric Singer, Gene Simmons, Paul Stanley, Lee Kerslake, Mick Box |
Synopsis
General Mayhem: The Killing of Brigadier J
A young officer is killed inside a general's home. The investigation that followed revealed a cover-up at the highest ranks of the National Police.
Not On the Heep: The Heavy Metal Saga of Lee Kerslake
At Heavy Metal’s dawn, the sun rose to the beat of Lee Kerslake’s powerhouse drumming. Through a career of 50 years and 60 million albums sold, he became a legend. Now he must face the end of his days. He reconnects with lifelong pals from Kiss, Ozzy Osbourne, Def Leppard, Deep Purple and Iron Maiden, and performs one last time with the band he created, Uriah Heep.
Where to watch
Where to watch General Mayhem: The Killing of Brigadier JWhere to watch Not On the Heep: The Heavy Metal Saga of Lee Kerslake
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