Grandpa and Jimmy have been best friends ever since they were 4-years-old.
This episode marks the final performance of Richard Mulligan (Jimmy Kafka) before his passing on September 26, 2000. The episode itself premiered over three months after Mulligan's death.
The character Jack LaPlane is a parody of fitness guru Jack LaLanne.
Continuity[]
Dr. Murray Steiglitz can be seen in the Old Iron Man competition despite being around 100 years of age.
The woman in the red dress holding the trophy previously appeared in the debate crowd in "Mr. Green Runs" and reappears at the start of Hey Arnold! The Movie, in the crowd.
When Arnold says, “Good Morning Grandpa.” Grandpa says, “What’s good about it?!” This is the second time that he said that the first time he said that was in “Grandpa's Birthday”.
