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Alias: “John Doe”

Related Links:  Fearsome Five •
The Calculator

Teen Titans File Photo:



Little information is available concerning the Alcatraz inmate known as Rumble.  Listed as a “John Doe,” the career criminal is powered by a high-tech suit that enables its wearer to shoot sonic blasts.

The Calculator hired Mammoth, Shimmer and Jinx to free Nano and Rumble from Alcatraz Prison. His true objective was to exact revenge on the Teen Titans, whom he blamed for the death of his son, Marvin. To this end, Calculator’s prison breakout would trap the Titans on Alcatraz Island, where where a nuclear-powered inmate would reach critical mass and destroy San Francisco. Calculator’s plan was thwarted when Eddie Bloomberg used the T-jet to fly the inmate away – at the cost of Eddie’s own life.

Later, the Fearsome Five tussled with Donna Troy in Miami, where the Titan was called to photograph  the grand opening of a new resort hotel. Discovering the job assignment was a trap, Troy quickly dispatched Shimmer, Mammoth, Jinx, Nano and Rumble.

The Fearsome Five, as gathered by the Calculator, in TEEN TITANS (third series) #73 [2009].

 Powers & Abilities

Rumble has the power to shoot sonic blasts from his helmet.


Essential Reading

Teen Titans #72-74 [2009]: The Calculator seeks revenge against the Teen Titans on behalf of his children, Wendy and Marvin. The genius criminal kidnaps Kid Eternity and hires the Fearsome Five to assault the Titans – a battle which results in the death of Eddie Bloomberg. First appearance of Rumble. Nano and Rumble join the Fearsome Five. Death of Kid Devil (Eddie Bloomberg).
Titans #20 [2010]: Spotlight on Donna Troy! What happens when a young twenty-something woman feels like she grew up too fast and deprived herself of a twenty-something kind of life? As Donna ponders this, the Fearsome Five continue their Titans revenge streak. They picked the wrong time to do it…


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End of transmission. About this author:  Bill Walko is an author and artist and the man behind He's been reading and drawing comics since he was 5 years old and hasn't stopped since. Read more from this author