Quackenbush, modeled after director Chris Bennett, is used as a frequent background character.
He appears in the CIA blooper reel in "Phantom of the Telethon".
Thanks to Stan, he fails in his attempt to get out of jury duty in "The People vs. Martin Sugar".
Quackenbush appears in a wedding announcement when Marguerite tires to research the hot tub in "Hot Water" and is also in attendance at Principal Lewis' planned wedding to Ellen Riggs in "The Worst Stan".
In "She Swill Survive", Avery Bullock kicks him out of the CIA inner circle to make room for Stan by using an ejector seat. However, they decide they need to work on the ceiling in the inner circle room.
Francine passes Quackenbush as she tries to catch up with the garbage truck in "The Two Hundred", is at the Washington Nationals game in "One-Woman Swole" and participates in the hot dog eating content in "The Legend of Old Ulysses".
- "Phantom of the Telethon"
- "Home Adrone"
- "My Morning Straitjacket"
- "The People vs. Martin Sugar"
- "Hot Water"
- "The Worst Stan"
- "The Kidney Stays in the Picture"
- "Love, American Dad Style"
- "She Swill Survive"
- "The Two Hundred"
- "One-Woman Swole"
- "The Legend of Old Ulysses"
- "Tapped Out"
- "The Last Ride of the Dodge City Rambler"