Speed of Sound

Speed of Sound is the one hundred and fifty-ninth episode of Ben 10.
==Summary==
Team Tennyson participate in the inaugural ride of the fastest train in the world but the conductor turns out to be Lord Decibel and Ben must derail his master plan.
==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===
* Ben and Gwen meet Max and Phil's friend and apprentice Helen Troy.
* Lord Decibel donated his tech to a company and tricked the owner to make his own personal train to take the passengers as hostages.
===Minor Events===
*Lord Decibel attempts to remove the Omnitrix for the first time.
*Ben finds out about how to use Omni-Kix XLR8's back booster.
==Characters==
*Ben Tennyson
*Gwen Tennyson
*Max Tennyson
*Helen Troy (first appearance)
===Villains===
*Lord Decibel
==Aliens Used==
*Heatblast
*XLR8 (goes Omni-Kix)
**Omni-Kix XLR8 
*Four Arms (off-screen)
**Omni-Kix Four Arms (unintentional transformation)
==Quotes==
==Naming and Translations==
==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.
==References==
es:La_velocidad_del_sonido
Category:Ben 10 Reboot Episodes
Category:Ben 10 Reboot Season Four Episodes
Category:Episodes