Jeff 'Swampy' Marsh

Jeff "Swampy" Marsh (born December 9, 1960) is an American animator, writer, director, producer, and voice actor associated with several animated television series, most notably as an executive producer and the voice of Major Monogram for Disney's animated series Phineas and Ferb and Milo Murphy's Law, both of which he co-created with Dan Povenmire. Marsh was born in Santa Monica, California, where he grew up with a heavily blended family dynamic. Marsh has been and continues to be a driving force behind several animation projects, working for over six seasons on the animated television series The Simpsons. Marsh continued to work on other animated television series, including King of the Hill and Rocko's Modern Life, before moving to England in 1996.

Works

Phineas and Ferb

Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace, who tries to bust them. Meanwhile, their pet platypus plots against evil Dr. Doofenshmirtz.

Release Date2007-08-17

DepartmentWriting

JobWriter

Charactersd Francis Monogram (voice)

Episode Count12

Vote Count931

Milo Murphy's Law

Milo Murphy is the personification of Murphy’s Law where anything that can go wrong will go wrong. Suffering from Extreme Hereditary Murphy’s Law condition (EHML), Milo always looks to make the best of the cards he’s been dealt and his endless optimism and enthusiasm can turn any catastrophe into a wild adventure. Together, he and his friends will learn that it’s all about a positive attitude and not to sweat the big stuff… and it’s all big stuff.

Release Date2016-10-03

DepartmentProduction

JobExecutive Producer

Charactersd Additional Voices (voice)

Episode Count73

Vote Count89

Bounty Hamster

Cassie's father gets kidnapped by space pirates. She is determined to find him and she enlists the aid of the only bounty hunter she can afford, a talking blue hamster named Marion. They have an odd-couple style relationship and travel the universe together in search of her father.

Release Date2003-01-09

Charactersd (voice)

Episode Count1

How NOT to Draw

A short drawing tutorial parody series where animators bring beloved Disney characters to life, and the characters bring chaos.

Release Date2022-09-30

Charactersd Major Monogram (voice)

Episode Count1

Aaagh! It's the Mr. Hell Show!

Aaagh! It's the Mr Hell Show is an animated comedy show created by David Max Freedman & Alan Gilbey after the greeting card line about a painfully honest demon created by cartoonist Hugh MacLeod. The series only ran for one season of thirteen episodes in 2001/2002, produced by a British-Canadian collaboration. The basic format was a series of sketches linked by the eponymous Mr. Hell, a Satan-esque host voiced by comedian Bob Monkhouse - the last series before his death. Notable characters in the series include Josh, voiced by Jeff "Swampy" Marsh, who attempts to start a discussion about reincarnation before getting inevitably killed, and Serge the fashion industry seal of death, who wants to take revenge on the fashion industry for killing his parents. Mr. Hell also regularly has his own sketches, some featuring his illegitimate son Damien, the son of Mr. Hell and Angela an angel.

Release Date2001-10-28

Charactersd Josh (voice)

Episode Count13

Vote Count5

Phineas and Ferb The Movie: Across the 2nd Dimension

Phineas and Ferb get trapped in an alternate dimension where the evil Doofenshmirtz rules the tri-state area. They must find a way back home with the help of their pet platypus named Perry, who they discover is a secret agent.

Release Date2011-08-05

DepartmentCrew

JobSequence Supervisor

Charactersd Major Francis Monogram / Monogram-2 (voice)

Vote Count573

Phineas and Ferb the Movie: Candace Against the Universe

Phineas and Ferb travel across the galaxy to rescue their older sister Candace, who has been abducted by aliens and taken to a utopia in a far-off planet, free of her pesky little brothers.

Release Date2020-08-27

DepartmentWriting

JobCharacters

Charactersd Major Monogram (voice)

Vote Count382

Phineas and Ferb: Mission Marvel

Phineas and Ferb team up with the Avengers to save the world from Dr. Doofenshmirtz and a group of dangerous supervillains.

Release Date2013-08-16

DepartmentWriting

JobCharacters

Charactersd Francis Major Monogram / Gordon Gutsofanemu / Additional Voices

Vote Count170

Phineas and Ferb: Star Wars

Phineas and Ferb become the galaxy's unlikeliest last hope when they must return the Death Star plans to the Rebel Alliance.

Release Date2014-07-26

DepartmentCrew

JobCreator

Charactersd Major Hologram / Imperial Officer Jeff / Additional Voices

Vote Count213

Phineas and Ferb: Summer Belongs to You!

It's the summer solstice, so Phineas, Ferb, and their friends decide to travel around the world in one day in an effort to create the "biggest, longest, funnest summer day of all time". But not everyone believes they can actually achieve what they have set out to do, especially Buford. Candace tags along because Jeremy is on a trip to Paris, and she fears that there he may meet other girls. Also, Isabella finds her affections for Phineas sorely tested when his steadfast focus on achieving his goal puts pressure on her. Meanwhile, Dr. Doofenshmirtz takes a father trip to Tokyo, Japan with Vanessa, but sets out with Perry and Major Monogram to find her when she joins Phineas, Ferb and the others.

Release Date2010-08-02

DepartmentWriting

JobStory

Charactersd Major Francis Monogram (voice) / Additional Voices

Vote Count37

Phineas and Ferb: Last Day of Summer

On the inevitable 104th day of summer vacation, the season — and the series — is quickly coming to an end, and it’s Candace’s last chance to bust her brothers; who build huge playground equipment for the finale of summer. She is quickly foiled, but when she goes to return a DVD to Vanessa and finds Dr. Doofenshmirtz’s Do-Over-Inator, she finds an opportunity to redo the day, which results in other consequences like rips in the space-time continuum, the shortening of days and the disappearance of her brothers.

Release Date2015-06-15

Charactersd Major Monogram (voice)

Vote Count34

Spiked

Holly is a young, courageous hedgehog, but woefully sheltered by her overprotective Dad. Walter is an overworked, exhausted rabbit with a few dozen kids of his own, who just wants a change in his predictable routine. When this unlikely duo crashes into each other’s lives, things take a drastic turn. After a bump to the head Walter now believes that he is Sir Balderdash the Great – a hero, a warrior, a legend. While Holly, who is just thrilled to be out of the house, gets swept up in Walter's concussion fuelled fantasy.

Release Date2025-07-03

Charactersd (voice)

Vote Count1

Phineas and Ferb Christmas Vacation!

Phineas and Ferb turn the city of Danville into a giant thank you card for Santa Claus because they feel nobody ever thanks him for all the joy he brings to the world. Doofenshmirtz uses a device called the "Naughty-inator" to put the city of Danville on Santa's naughty list.

Release Date2009-12-07

DepartmentProduction

JobProducer

Charactersd Major Monogram (voice)

Vote Count20

O.W.C.A. Files

When an attack on the O.W.C.A. incapacitates the animal agents, only Agent P and his animal trainees can save the day. Carl and Monogram fend for themselves.

Release Date2015-11-09

DepartmentProduction

JobExecutive Producer

Charactersd Major Monogram / Additional Voices (voice)

Vote Count6

Phineas and Ferb Save Summer

When L.O.V.E.M.U.F.F.I.N. moves the Earth further from the sun, Phineas and Ferb must find a way to save summer and prevent a new ice age.

Release Date2014-06-09

DepartmentCrew

JobCreator

Charactersd Major Francis Monogram / Additional Voices (voice)

Phineas and Ferb: Night of the Living Pharmacists

Doofenshmirtz's latest "-inator" accidentally turns the citizens of Danville into contagious mindless repulsive pharmacists that look like him who run rampant all over town. Agent P and the kids must work together to save Danville and avoid becoming mindless repulsive pharmacists themselves.

Release Date2014-10-04

DepartmentCrew

JobCreator

Charactersd Major Francis Monogram (voice)

Vote Count6

Phineas and Ferb: The Perry Files - Animal Agents

Perry the Platypus - a.k.a. Agent P - and his fellow operatives team up to thwart Dr. Doofenshmirtz and his dastardly "Inators." Be they furry or feathered, scaly or slimy, these fearless agents roll over for nobody when it comes to crushing evil in the Tri-State Area and beyond.

Release Date2013-02-26

Charactersd Major Monogram (voice)

Vote Count10

Phineas and Ferb: The Daze of Summer

Super-smart and seriously funny stepbrothers Phineas and Ferb come up with unusually exciting ways to spend the lazy, crazy "daze" of summer -- like searching for pirate's treasure, traveling to Mars, building Greek chariots, and hosting a Medieval jousting tournament!

Release Date2012-02-07

DepartmentWriting

JobWriter

Charactersd

Vote Count7

I Know That Voice

Filmmaker Lawrence Shapiro discusses voice-over acting with the talented people behind the characters.

Release Date2014-01-07

Charactersd Self

Vote Count99

TV's Funniest Animated Stars: A Paley Center for Media Special

The top 40 funniest cartoon characters are showcased in this TV special, as determined by a Nielsen viewers' survey.

Release Date2015-12-07

Charactersd Self

Rocko's Modern Life

Rocko is a wallaby who has emigrated to America from Australia. He lives in O-Town and tries to get through life but, of course, comes across a multitude of dilemmas and misadventures he must get through. Other characters include Rocko's best friend, Heffer, a steer who has been raised by wolves, Filbert, a paranoid hypochondriac turtle, Rocko's faithful (but none-too-bright) dog Spunky, and Ed Bighead who detests Rocko and hates having him for a next door neighbor. On this show, Rocko has such adventures as trying to adapt to a new vacuum cleaner, having Heffer move in temporarily after his parents kick him out, and going to a movie theater.

Release Date1993-09-18

DepartmentArt

JobStoryboard Artist

Episode Count20

Vote Count291

Pete the Cat

Along with his pals - Callie Cat, Grumpy Toad, Sally Squirrel, Emma the Quebecoise Pug, Gustavo the Platypus, Pete brings you along on their adventures. Whether learning to conquer his fears of the waves, meeting the new platypus on the block, starting a band with his friends or chasing a trick-or-treating ghost, Pete and his pals always try to keep cool, keep kind and keep rocking.

Release Date2017-12-25

DepartmentWriting

JobWriter

Episode Count2

Vote Count7

Take Two with Phineas and Ferb

Have you ever wanted to see Jack Black interviewed by cartoon characters? Now's your chance. Step brothers Phineas Flynn and Ferb Fletcher have an animated talk show set complete with a desk, chairs and skyline backdrop. Each episode, a celebrity (in live-action form) takes a seat on the cartoon set and answers questions posed by the titular pair.

Release Date2010-12-03

DepartmentCreator

JobCreator

Vote Count40

Super Happy Magic Forest

Five heroes are brought together by their mutual love of questing, picnics and frolicking.

Release Date2024-10-07

DepartmentProduction

JobExecutive Producer

Episode Count52

Cartoonified! With Phineas and Ferb

In Cartoonified, your favorite celebrities become cartoons in each new episode! In this season of Cartoonified, Phineas and Ferb go on wild adventures with their favorite animated celebrities!

Release Date2025-07-25

DepartmentCreator

JobCreator

Vote Count1

Looks Can Kill

A stripper takes vengeance on her audience.

Release Date1994-02-07

DepartmentProduction

JobAssociate Producer

Vote Count2