Marvin Marsh

"Grampa" Marvin Marsh is a fictional character in the animated series South Park. He is Stan Marsh's suicidal grandfather, who is voiced by Trey Parker. In episode "Death", he is revealed to have just turned 102 years of age. If Randy is only 35 years old, as has been mentioned, then this would have made Grampa 67 years old when Randy was born. We have yet to learn why he was so old at the time of his son's birth.

In the episode Grey Dawn, Marvin Marsh revealed that he worked 55 years in a steel mill. In World War II, he flew a Spitfire over Germany, probably a reference to one of the four groups of United States Army Air Forces stationed in England and the Mediterranean equipped with the Supermarine Spitfire, a British single-seat fighter.

Appearance
He wears a dark red sweater and black trousers. He is wrinkly and has age spots here and there. His hair is gray. Grampa is confined to a wheel-chair.

Family
He has been referred to as both Stan's maternal and paternal grandfather. As the series progressed, though, he was more heavily implied to be Randy's father, sharing his surname as well. This is backed up even further in "Fantastic Easter Special", where Randy says his family has been in a society which guards a secret about Easter for generations, and Grampa is shown to be a member.

He often addresses Stan as "Billy", to which Stan will angrily tell him that he is not named Billy, his name is Stan. This name confusion appears to be genetic, as the ghost of Stan's great-great-grandfather called his grandson "Billy" instead of "Marvin" in the episode "Death".

Episodes in which he is prominent
"Death" In his first appearance Grampa Marsh desperately wants to die because he is bored with life. After his own failed attempt at suicide, he turns to Stan (whom he refers to as "Billy") to do the job for him. Stan approaches various people for advice on the matter but all are unwilling to answer. When Grampa Marsh eventually does convince Stan to kill him, Death's sudden appearance foils the plan (although Death was actually looking for Kenny). Death points into the light where Grampa Marsh's own grandfather (who refers to Marvin as "Billy"), whom he had killed when he was a boy, convinces him to wait for natural causes.

"Grey Dawn" In the season seven episode "Grey Dawn", South Park's elderly residents are angered when their driving licenses are taken away after their bad driving kills a number of people. He started a movement to let the elderly keep their licenses, but it ultimately failed. He was later caught driving without his license (which had been taken away) and he was arrested. However, he was soon rescued by the AARP, whom he teams up with to start randomly killing anyone in sight. After a brief period of complete control of South Park, and plans to overtake the entire country, his group is thwarted when the four main South Park boys lock them out of the Country Kitchen Buffet (their only source of food). The group eventually surrenders, and life returns to normal.

"The Red Badge of Gayness"- The narrator to the crowd at the Civil War reenactment; leads the group in its attempt to stop the Southern reenactors from taking over the country. Also says "You bastards!" when Kenny dies, instead of Kyle.

"Quintuplets 2000"- Complains that Stan and the others shouldn't be taken to a French Canadian circus to learn about the arts; has sex with the quintuplets' grandmother, during which she dies.

"Something Wall-Mart This Way Comes"- Becomes a worker at the new Wall-Mart.