Calahan went along with Peck's plans and never questioned him. After Walter Peck tried to destroy Slimer, he and Calahan were fired for putting the entire B.U.F.O. agency at risk.
- Calahan's Identification Number is 62614 . It is briefly seen at the end of the episode when the commanding officer fires him and Peck.
- On page 19 of Ghostbusters Issue #11, Calahan makes a non-canon cameo as one of the patrons in the Roswell's Belda'r Cafe.
- ↑ Walter Peck (2009). The Real Ghostbusters - "Big Trouble With Little Slimer" (1987) (DVD ts. 01:24-01:26). Time Life Entertainment. Peck says: "Don't lose them, Calahan."
- ↑ Screen cap of name tag