Farrell was a male Human Starfleet officer in the 24th century. By the year 2370, he held the rank of captain, and was attached to the Starfleet Inspector General Office.
In that year, Captain Farrell visited Deep Space 9 to evaluate the crew. While Farrell was initially displeased by his findings, he later learned that the crew were tired because they were looking after an abandoned baby. Farrell had several grandchildren, so was used to babies. (DS9 comic: "Baby on Board")