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Ben 10 S4E27 — Speed of Sound

6.7

Ben 10•Season 4•Episode 27

Speed of Sound

6.7/10 · 94 votesJul 7, 202011 min

Ranked #1 of 34 in Season 4•+1.3 vs season avg

Team Tennyson participates 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.

Previous episodeE26 · Medieval Upheaval Next episodeE28 · Xingo's World

Seasons4

Season 4 Episodes34

Chicken In Chichen Itza Part 1: Pyramid Scheme still

Chicken In Chichen Itza Part 1: Pyramid Scheme

Chicken In Chichen Itza, Part 2: The Wages of Fear still

Chicken In Chichen Itza, Part 2: The Wages of Fear

Ben in Rome, Part 1: A Slice of Life still

Ben in Rome, Part 1: A Slice of Life

Ben in Rome, Part 2: The Bee's Knees still

Ben in Rome, Part 2: The Bee's Knees

Gentle Ben still

Gentle Ben

Funhouse still

Funhouse

Summer Breakers still

Summer Breakers

The Monsters in Your Head still

The Monsters in Your Head

Queen of Bees still

Queen of Bees

Falls, Falls, Falls still

Falls, Falls, Falls

The Greatest Lake still

The Greatest Lake

Mud on the Run still

Mud on the Run

It's Story Time still

It's Story Time

Cosplay Day still

Cosplay Day

Bottomless Ben still

Bottomless Ben

Tales from the Omnitrix still

Tales from the Omnitrix

Party Poopers still

Party Poopers

Wind Some Lose Some still

Wind Some Lose Some

Digital Quality still

Digital Quality

Tim Buk-TV still

Tim Buk-TV

Tokyo Fun Part 1: Big Bugg Bash still

Tokyo Fun Part 1: Big Bugg Bash

Tokyo Fun Part 2: Slamming It Up still

Tokyo Fun Part 2: Slamming It Up

Growing up is Hard to Do still

Growing up is Hard to Do

The Hex Factor still

The Hex Factor

Sweet Tooth still

Sweet Tooth

Medieval Upheaval still

Medieval Upheaval

Speed of Sound still

E27 6.7Now viewing

Speed of Sound

Xingo's World still

Xingo's World

Tummy Ache still

Tummy Ache

Players of the Lost Park still

Players of the Lost Park

De-Fanged! still

De-Fanged!

Mock 10 still

Mock 10

Rekoil still

Rekoil

Buktu The Future! still

Buktu The Future!

Cast8

Tara Strong

Tara Strong

Ben Tennyson

Montse Hernandez

Montse Hernandez

Gwen Tennyson

David Kaye

David Kaye

Max Tennyson

Roger Craig Smith

Roger Craig Smith

Diamondhead

Josh Keaton

Josh Keaton

XLR8

John DiMaggio

John DiMaggio

Four Arms

Daryl Sabara

Daryl Sabara

Heatblast

Travis Willingham

Travis Willingham

Cannonbolt

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Episode Summary

"Speed of Sound" is episode 27 of Ben 10 season 4. It scored 6.7/10 from 94 votes, ranking #1 of 34 episodes this season (season average 5.4). It aired on July 7, 2020.

Next: E28 · Xingo's World Best of Season 4