S04E03: Don't Drink the Water
After being in contact with water from the Fountain of Youth, Grandpa Max and Ben are reverted to being kids again. Now, Gwen is left to take care of them while stopping Hex from finding the fountain's source.
Previous Episode 
Season 1
And Then There Were 10
S1E1 / 27 Dec 2005
Washington B.C.
S1E2 / 13 Jan 2006
The Krakken
S1E3 / 14 Jan 2006
Permanent Retirement
S1E4 / 21 Jan 2006
Hunted
S1E5 / 28 Jan 2006
Tourist Trap
S1E6 / 04 Feb 2006
Kevin 11
S1E7 / 11 Feb 2006
The Alliance
S1E8 / 18 Feb 2006
Last Laugh
S1E9 / 25 Feb 2006
Lucky Girl
S1E10 / 04 Mar 2006
A Small Problem
S1E11 / 11 Mar 2006
Side Effects
S1E12 / 18 Mar 2006
Secrets
S1E13 / 25 Mar 2006
Season 2
Truth
S2E1 / 29 May 2006
The Big Tick
S2E2 / 30 May 2006
Framed
S2E3 / 31 May 2006
Gwen 10
S2E4 / 01 Jun 2006
Grudge Match
S2E5 / 07 Jun 2006
The Galactic Enforcers
S2E6 / 13 Jun 2006
Camp Fear
S2E7 / 21 Jun 2006
Ultimate Weapon
S2E8 / 06 Jul 2006
Tough Luck
S2E9 / 12 Jul 2006
They Lurk Below
S2E10 / 18 Jul 2006
Ghostfreaked Out
S2E11 / 25 Jul 2006
Dr. Animo and the Mutant Ray
S2E12 / 25 Aug 2006
Back With a Vengeance
S2E13 / 09 Oct 2006
Season 3
Ben 10,000
S3E1 / 25 Nov 2006
Midnight Madness
S3E2 / 02 Dec 2006
A Change of Face
S3E3 / 09 Dec 2006
Merry Christmas
S3E4 / 11 Dec 2006
Benwolf
S3E5 / 17 Feb 2007
Game Over
S3E6 / 24 Feb 2007
Super Alien Hero Buddy Adventures
S3E7 / 03 Mar 2007
Under Wraps
S3E8 / 10 Mar 2007
The Unnaturals
S3E9 / 17 Mar 2007
Monster Weather
S3E10 / 24 Mar 2007
The Return
S3E11 / 07 Apr 2007
Be Afraid of the Dark
S3E12 / 14 Apr 2007
The Visitor
S3E13 / 21 Apr 2007
Season 4
Perfect Day
S4E1 / 07 Jul 2007
Divided We Stand
S4E2 / 14 Jul 2007
Don't Drink the Water
S4E3 / 21 Jul 2007
Big Fat Alien Wedding
S4E4 / 28 Jul 2007
Secret of the Omnitrix (1)
S4E5 / 04 Aug 2007
Secret of the Omnitrix (2)
S4E6 / 04 Aug 2007
Secret of the Omnitrix (3)
S4E7 / 04 Aug 2007
Ben 4 Good Buddy
S4E8 / 22 Sep 2007
Ready to Rumble
S4E9 / 29 Sep 2007
Ken 10
S4E10 / 06 Oct 2007
Ben 10 vs. Negative 10 (1)
S4E11 / 09 Mar 2008
Ben 10 vs. Negative 10 (2)
S4E12 / 09 Mar 2008
Goodbye and Good Riddance
S4E13 / 15 Apr 2008
Tara Strong
Ben Tennyson (voice)
Meagan Moore
Gwen Tennyson (voice)
Paul Eiding
Grandpa Max (voice)
Dee Bradley Baker
Stinkfly / Wildmutt (voice)
Steve Blum
Ghostfreak / Heatblast / Vilgax (voice)
Richard McGonagle
Four Arms (voice)
Richard Steven Horvitz
Grey Matter (voice)
