Speed of Sound is the one hundred and fifty-ninth episode of Ben 10.
Synopsis[]
Team Tennyson participates in the inaugural ride of the fastest train in the world; the conductor turns out to be Lord Decibel, and Ben must derail his master plan.[ATV 1]
Plot[]
The Tennyson's are on the Sonitrain and Gwen tells Ben on how much of a hero Helen Troy is to her, the one who designed the train. Max tells the kids that she was Phil's old apprentice, so he's the one who got them the opportunity. He also tells them that Phil said keep an eye on her.
Noteworthy Events[]
Major Events[]
- The Sonitrain is introduced.
Character Debut[]
Characters[]
Main Characters[]
Supporting Characters[]
- Helen Troy (first appearance)
Antagonists[]
Aliens Used[]
- Heatblast
- XLR8 (goes Omni-Kix)
- Four Arms (off-screen)
- Omni-Kix Four Arms (unintentional transformation)
Quotes[]
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Naming and Translations[]
| Language | Name | Origin |
|---|---|---|
| Spanish (HA) | La velocidad del Sonido | Speed of Sound |
Cast[]
Continuity[]
- This marks the fifth time the Omnitrix experiences technical glitches, as it previously happened in Riding the Storm Out, Innervasion Part 1: Message in a Boxcar, Poles Apart, and Lickety Split.
Trivia[]
- This is the first time Ben switches from one Omni-Kix alien to another.