In 2268, he sent the USS Enterprise a priority message, following its arrival at Deep Space K-7, to remind Captain James T. Kirk of the importance of winning the Sherman's Planet project, with which they were presently involved. He emphasized that the key was the grain quadrotriticale, which was being held aboard K-7, ordering Kirk, "Effective immediately, you will render any aid and assistance which Undersecretary Baris may require," further pointing out that "the safety of the grain and the project is your responsibility." (TOS: "The Trouble with Tribbles")
The role of Admiral Fitzpatrick was played by well-known announcer Ed Reimers, familiar in the 1960s for his trademark spokesman line, "You're in good hands with Allstate (Insurance)." A well-known outtake from the episode features a gag where at the end of the communication, Reimers catches a tribble thrown to him from offscreen, and says "You're in good hands with tribbles."
Fitzpatrick was the only admiral in The Original Series to have rank insignia visible, a wide gold band (as worn by commodores), with a single solid rank stripe above and beneath it. Since a similar uniform style, in Star Trek: The Motion Picture, used a commodore insignia with one stripe above it to signify a rear admiral, Fitzpatrick, while simply called "admiral" in dialogue, would thus seem to be a vice admiral.