For Kathryn Janeway's ancestor, please see Shannon O'Donnel.
For Juliana O'Donnell, please see Juliana Tainer.

O'Donnell was a Human male Starfleet officer who served aboard the USS Voyager under Captain Kathryn Janeway during the 2370s.

A hologram of O'Donnell helped Chakotay take the ship in Tuvok's holodeck program entitled Insurrection Alpha. In the scenario, he was one of twenty-five Starfleet crewmembers who sympathized with the Maquis in supporting Chakotay's takeover of the ship. In the original scenario he and Carlson delivered a duty roster to the bridge when initiated the insurrection. During the scuffle, he took out Ensign Harry Kim. He and Carlson later escorted the prisoners who refused to join under Chakotay's leadership to the brig, where he remained to guard the imprisoned bridge crew.

O'Donnell later appeared in Seska's variation of the program, when he assisted Chakotay in capturing Tuvok and Tom Paris. (VOY: "Worst Case Scenario")

O'Donnell was part of the security away team which accompanied Captain Janeway and Seven of Nine aboard the USS Dauntless, where he tried to stop Arturis when he activated the quantum slipstream drive. He was unable to stop him and beamed aboard Voyager. (VOY: "Hope and Fear")

In both appearances O'Donnell was played by stunt actor Ransom Gates, who received no credit for his appearances.
In the script for "Worst Case Scenario" this character was originally named "McKenzie".
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