O'Halloran
Ensign O'Halloran was the role played by a member of Species 8472, a male Starfleet sciences division officer in the 24th century.

In 2375, the Species 8472 member who impersonated O'Halloran trained at Terrasphere 8 for infiltrating the Federation. This O'Halloran had problems in keeping his Human form and suffered three reverts  in one week; had he suffered one more, he would have been kicked out of the program. ()

de:O'Halloran
fr:O'Halloran (espèce 8472)
Species 8472
Starfleet Headquarters personnel
Starfleet sciences personnel
Humans
Aliases