Although Irwin only appeared in episode #33: “The Day Independence Came” (which was briefly flashbacked in 1988's retrospective episode, Auld Lang Syne), Donald Long mentioned on the 43rd edition of Official Podcast, that Irwin was his favorite character to play on the show. He went on to describe his amazement at the acting talent of older actors during the recording of "The Day Independence Came".
The correct spelling of "Irwin" has been somewhat disputed. The official website, WhitsEnd.org, spells the name as "Irwin." This same spelling is confirmed by the script for #33: “The Day Independence Came”. However, the albums Grins, Grabbers, and Great Getaways and Life Lessons 09: Citizenship, spell the name "Erwin".
|“|| Nathan Hale: Well, we've had quite an adventure, and I don't even know your name or where you're from.
Irwin Springer: I'm Irwin Springer from Odyssey.
Nathan Hale: Well Irwin Springer from Odyssey, I thank you for saving my life.
Irwin Springer: Likewise, I'm sure. And you are?
Nathan Hale: My name is Hale, Nathan Hale.
Irwin Springer: Nathan Hale, the Nathan Hale!?
Nathan Hale: You've heard of me?
Irwin Springer: Who hasn't heard of you?!
|“|| Irwin Springer: Oh wow, oh wow!
George Washington: Oh, wow? Is that some sort of Indian greeting?
Nathan Hale: I don't know, sir. He does seem to say it often, though.
George Washington: Well, in the interests of maintaining good relations with the people of Odyssey, I say "Oh wow" to you, Irwin Springer.
Irwin Springer: Thank you, sir!
|“|| Nathan Hale: Can you swim?
Irwin Springer: No.
Nathan Hale: Well, there's no time like the present to learn.
|“|| Irwin Springer: Benjamin Franklin looked and sounded just like you!
John Whittaker: Really? <in Ben Franklin's voice> Poor fellow.
Irwin Springer: <beat> Oh, wow!