Humphrey is the slow-witted, but loving husband of Ingrid and proud father of Baby Natasha who first appeared in season 22 of Sesame Street in Episode 2851. He made minor recurring appearances in seasons 23 and 24, referred to only as "Natasha's father."
In season 25, his role became more fleshed out. He was finally given a name and a wife. With addition of the Around the Corner area, the two were made employees of the Furry Arms Hotel. In Episode 3623, it was established that Humphrey started out as a lowly bellhop in the hotel, where he and Ingrid met, fell in love and got married. The episode also establishes his full name as Humphrey J. Monster.
When the "Around the Corner" area was dropped for season 30, Humphrey and Ingrid continued to make recurring appearances through 2006.
- Sesame Street
- Sesame Street: 25 Wonderful Years
- Sesame Street Stays Up Late
- Elmo Saves Christmas
- "Don't Forget to Watch the Movie"
- 123 Count with Me
- The Rosie O'Donnell Show (November 11, 1998)
- Sesame Street 4-D Movie Magic
- Natasha's Daddy (1993)
- Around the Corner on Sesame Street (1994)
- Baby Natasha in "Say Cheese!" (1994)
- Ready, Set, Go! A Counting Book (1995)
- Elmo's Lift-and-Peek Around the Corner Book (1996)
- Rise and Shine! (1996; reworked as Up, Up, Up! in 2011)
- Zoe and the Runaway Ball (1996)
- Christmas Songs (1997)
- Elmo Loves You! (1997)
- Elmo Says, "Don't Wake the Baby!" (1997)
- Elmo's Christmas Colors (1997)
- The Poky Little Puppy Comes to Sesame Street (1997)
- Sounds of Sesame Street (2000)
- Watch Out for Banana Peels (2000)
- The Furry Arms Hotel (2001)
- The Monsters on the Bus (2001)
- Be Polite (2006)
- Please and Thank You (2006)