Gransimpson is the first episode of the fourth season of RS Mr. Conductor the Conductor and Friends, and the seventy-ninth episode overall. It is a parody of the Thomas and Friends episode, Granpuff.
- RS Mr. Conductor (from Shining Time Station) as Thomas
- Bart (from The Simpsons) as Percy
- Grandpa Dave (from Arthur) as Toby
- Spike (from My Little Pony: Friendship is Magic) as Duck
- Grandpa Abe Simpson (from The Simpsons) as Duke
- Cat (from Little Bear) as Sir Handel/Falcon
- Bear (from Franklin) as Peter Sam/Stuart
- Stewie (from Family Guy) as Smudger
- Captain Star (from TUGS) as The Mid-Sodor Railway Manager (does not speak)
- Homer (from The Simpsons) as Henry (cameo)
- Garfield (from Garfield and Friends) as Gordon (cameo)
- Franklin (from Franklin) as Skarloey (cameo)
- Rabbit (from Franklin) as Rheneas (cameo)
- Merlin (from The Sword in the Stone) as Sir Robert Norramby (indirectly mentioned)
- Everyone else as Themselves
Narrator: "One winter's night, when the cold wind blew, the TV Characters found it hard to sleep."
Grandpa Dave: "What we need..."
Narrator: "Suggested Grandpa Dave,"
Grandpa Dave: "Is to listen to a story."
Bart: "A mysterious story."
Narrator: "Said Bart."
Narrator: "Added Spike,"
Spike: "It must have a happy ending."
RS Mr. Conductor: "Driver told me a story,"
Narrator: "Said RS Mr. Conductor. So everyone listened."
RS Mr. Conductor: "Once upon a time,"
Narrator: "Began RS Mr. Conductor."
RS Mr. Conductor: "There were three little characters, who lived in their own little house on their own little land. Their names were Abe Simpson, Bear and Cat. Abe was the oldest, and was named after his grace, the Abraham of TV Land. He was proud of this, and loved to keep the younger characters in order.
Whenever they did anything that Abe thought wrong, he would say,"
Abe Simpson: "That would never suit his grace."
RS Mr. Conductor: "Other characters came and went, but Abe outlasted them all.
Bear and Cat used to call him 'Gransimpson.' They were fond of him, but they got very tired of hearing all about 'his grace'.
Sometimes they would tease him and chant,"
Cat and Bear: "Characters come and characters go, Gransimpson goes on forever."
Abe Simpson: "You impertinent scallywags!"
RS Mr. Conductor: "Abe would say."
Abe Simpson: "Whatever are you characters coming to?"
Bear: "Never mind, Gransimpson. We're only young once."
Abe Simpson: "Well, you better mind. Unless you want to end up like Stewie."
Cat: "Oh, Gransimpson? Whatever happened?"
Abe Simpson: "Stewie,"
RS Mr. Conductor: "Said Abe,"
Abe Simpson: "Was a show-off!
He rode roughly and often came off of the road.
I warned him to be careful, but he took no notice."
Stewie: "Listen, Abraham, who worries about a few spills?"
Abe Simpson: "'We do here,' I said, but Stewie just laughed."
Stewie: "He he he he he!"
Abe Simpson: "Until one day, Captain Star said he was going to make him useful at last. Stewie stopped laughing then."
Bear: "Why? W-w-what did he do?"
Abe Simpson: "He turned him into a generator. He's still out there behind our house. He'll never move again."
RS Mr. Conductor: "After that, Bear and Cat became really useful characters, and all three were happy together for many years.
Then, hard times came. The companies near the hills closed, and the land was closed, too. People came to buy the characters."
Passengers: "We'll take Bear and Cat."
RS Mr. Conductor: "No one wanted Abe. They thought him 'Too old'."
Bear: "Cheer up, Gransimpson."
RS Mr. Conductor: "Called Bear."
Bear: "We'll find you some nice land, and then you can come and keep us in order."
RS Mr. Conductor: "They tried to be brave and cheerful, but no one really thought their dreams would come true.
Abe's driver and fireman polished and greased him one last time. They sheeted him snugly, and said good-bye. They had to go away and find work. Abe was alone."
Abe Simpson: "Oh, well."
RS Mr. Conductor: "He sighed."
Abe Simpson: "I'll go to sleep. It'll help to pass the time."
RS Mr. Conductor: "Winter torrents washed soil from the hills. Trees and bushes grew all around. You wouldn't have known a house was there, let alone an old man asleep inside."
Bart: "That's not a happy ending!"
Narrator: "Exclaimed Bart."
RS Mr. Conductor: "Ah,"
Narrator: "Murmured RS Mr. Conductor sleepily."
RS Mr. Conductor: "There will be one, but that will have to wait until next time."