S02E18: I Know Your Secret
When Henry receives a series of mysterious notes from someone, he begins to worry that the sender may know his secret identity.
Previous Episode 
Season 1
The Danger Begins
S1E1 / 26 Jul 2014
Mo' Danger, Mo' Problems
S1E2 / 13 Sep 2014
The Secret Gets Out
S1E3 / 20 Sep 2014
Tears of the Jolly Beetle
S1E4 / 27 Sep 2014
Substitute Teacher
S1E5 / 04 Oct 2014
Jasper Danger
S1E6 / 18 Oct 2014
The Space Rock
S1E7 / 01 Nov 2014
Birthday Girl Down
S1E8 / 08 Nov 2014
Too Much Game
S1E9 / 15 Nov 2014
Henry the Man-Beast
S1E10 / 22 Nov 2014
Invisible Brad
S1E11 / 10 Jan 2015
Spoiler Alert
S1E12 / 24 Jan 2015
Let's Make a Steal
S1E13 / 31 Jan 2015
Super Volcano
S1E14 / 07 Feb 2015
My Phony Valentine
S1E15 / 14 Feb 2015
Caved In
S1E16 / 28 Feb 2015
Elevator Kiss
S1E17 / 07 Mar 2015
Man of the House
S1E18 / 14 Mar 2015
Dream Busters
S1E19 / 21 Mar 2015
Kid Grounded
S1E20 / 04 Apr 2015
Captain Jerk
S1E21 / 11 Apr 2015
The Bucket Trap
S1E22 / 18 Apr 2015
Henry & the Bad Girl (1)
S1E23 / 02 May 2015
Henry & the Bad Girl (2)
S1E24 / 09 May 2015
Jasper's Real Girlfriend
S1E25 / 16 May 2015
Season 2
The Beat Goes On
S2E1 / 12 Sep 2015
One Henry, Three Girls (1)
S2E2 / 19 Sep 2015
One Henry, Three Girls (2)
S2E3 / 26 Sep 2015
Henry & the Woodpeckers
S2E4 / 03 Oct 2015
Captain Man: On Vacation
S2E5 / 10 Oct 2015
The Time Jerker
S2E6 / 07 Nov 2015
Secret Beef
S2E7 / 14 Nov 2015
Henry's Jelly
S2E8 / 21 Nov 2015
Christmas Danger
S2E9 / 28 Nov 2015
Indestructible Henry (1)
S2E10 / 19 Mar 2016
Indestructible Henry (2)
S2E11 / 26 Mar 2016
Text Lies & Video
S2E12 / 09 Apr 2016
Opposite Universe
S2E13 / 16 Apr 2016
Grave Danger
S2E14 / 14 Apr 2016
Ox Pox
S2E15 / 30 Apr 2016
Twin Henrys
S2E16 / 07 May 2016
Danger & Thunder
S2E17 / 18 Jun 2016
I Know Your Secret
S2E18 / 17 Jul 2016
Season 3
A Fiñata Full of Death Bugs
S3E1 / 17 Sep 2016
Love Muffin
S3E2 / 24 Sep 2016
Scream Machine
S3E3 / 01 Oct 2016
Mouth Candy
S3E4 / 08 Oct 2016
The Trouble with Frittles
S3E5 / 05 Nov 2016
Hour of Power
S3E6 / 11 Nov 2016
Dodging Danger
S3E7 / 03 Dec 2016
Double Date Danger
S3E8 / 11 Feb 2017
Space Invaders (1)
S3E9 / 11 Mar 2017
Space Invaders (2)
S3E10 / 18 Mar 2017
Gas or Fail
S3E11 / 24 Mar 2017
JAM Session
S3E12 / 08 Apr 2017
License to Fly
S3E13 / 15 Apr 2017
Green Fingers
S3E14 / 22 Apr 2017
Stuck in Two Holes
S3E15 / 29 Apr 2017
Live & Dangerous: Part 1
S3E16 / 16 Sep 2017
Live & Dangerous: Part 2
S3E17 / 23 Sep 2017
Balloons of Doom
S3E18 / 30 Sep 2017
Swellview's Got Talent
S3E19 / 07 Oct 2017
Season 4
Sick & Wired
S4E1 / 21 Oct 2017
Brawl in the Hall
S4E2 / 04 Nov 2017
The Rock Box Dump
S4E3 / 11 Nov 2017
Danger Games
S4E4 / 25 Nov 2017
Toon in for Danger
S4E5 / 15 Jan 2018
Meet Cute Crush
S4E6 / 10 Feb 2018
Back to the Danger (1)
S4E7 / 24 Mar 2018
Back to the Danger (2)
S4E8 / 31 Mar 2018
Budget Cuts
S4E9 / 07 Apr 2018
Diamonds Are for Heather
S4E10 / 14 Apr 2018
Car Trek
S4E11 / 28 Apr 2018
Toddler Invasion
S4E12 / 05 May 2018
Captain Man-kini
S4E13 / 12 May 2018
Saturday Night Lies
S4E14 / 19 May 2018
Henry's Frittle Problem
S4E15 / 22 Sep 2018
Spelling Bee Hard
S4E16 / 29 Sep 2018
Up the Stairs
S4E17 / 06 Oct 2018
Danger Things
S4E18 / 08 Oct 2018
Rubber Duck
S4E19 / 13 Oct 2018
Flabber Gassed
S4E20 / 20 Oct 2018
Season 5
Henry's Birthday
S5E1 / 03 Nov 2018
Whistlin' Susie
S5E2 / 10 Nov 2018
Thumb War
S5E3 / 17 Nov 2018
The Great Cactus Con
S5E4 / 24 Nov 2018
Part 1: A New Evil
S5E5 / 05 Jan 2019
Part 2: A New Darkness
S5E6 / 12 Jan 2019
Part 3: A New Hero
S5E7 / 19 Jan 2019
Broken Armed and Dangerous
S5E8 / 26 Jan 2019
Knight & Danger
S5E9 / 02 Feb 2019
Grand Theft Otto
S5E10 / 16 Feb 2019
The Whole Bilsky Family
S5E11 / 23 Feb 2019
Secret Room
S5E12 / 02 Mar 2019
My Dinner with Bigfoot
S5E13 / 09 Mar 2019
Charlotte Gets Ghosted
S5E14 / 16 Mar 2019
I Dream of Danger
S5E15 / 23 Mar 2019
Holey Moley
S5E16 / 15 Jun 2019
Love Bytes
S5E17 / 22 Jun 2019
Double-O Danger
S5E18 / 29 Jun 2019
Massage Chair
S5E19 / 13 Jul 2019
Henry Danger: The Musical
S5E20 / 27 Jul 2019
Sister Twister (1)
S5E21 / 21 Sep 2019
Sister Twister (2)
S5E22 / 28 Sep 2019
A Tale of Two Pipers
S5E23 / 05 Oct 2019
Story Tank
S5E24 / 12 Oct 2019
Captain Mom
S5E25 / 02 Nov 2019
Visible Brad
S5E26 / 09 Nov 2019
EnvyGram Wall
S5E27 / 16 Nov 2019
Holiday Punch
S5E28 / 30 Nov 2019
Mr. Nice Guy
S5E29 / 11 Jan 2020
Theranos Boot
S5E30 / 18 Jan 2020
Rumblr
S5E31 / 25 Jan 2020
Cave the Date
S5E32 / 01 Feb 2020
Escape Room
S5E33 / 08 Feb 2020
Game of Phones
S5E34 / 15 Feb 2020
Remember the Crimes
S5E35 / 22 Feb 2020
The Beginning of the End
S5E36 / 29 Feb 2020
Captain Drex
S5E37 / 07 Mar 2020
The Fate of Danger (1)
S5E38 / 14 Mar 2020
The Fate of Danger (2)
S5E39 / 21 Mar 2020
Jace Norman
Henry Hart / Kid Danger
Cooper Barnes
Ray Manchester / Captain Man
Riele Downs
Charlotte Page
Sean Ryan Fox
Jasper Dunlop
Ella Anderson
Piper Hart
