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Lieutenant Hadley.

For the mirror universe counterpart, please see Hadley (mirror).

Hadley was a Starfleet officer aboard the Federation starship Enterprise between 2266 and 2269 during Captain Kirk's five-year mission. He was a shift navigator and helmsman, but also served on security detachments aboard that ship. When assigned to the bridge, he usually wore a command division gold uniform.

Hadley was referred to as "lieutenant" on multiple occasions, but sometimes he wore an ensign's uniform (no insignia). His gold costume included the full lieutenant braid up until TOS Season 3, except for his brief appearance in "The Naked Time". It might be possible he was a lieutenant junior grade in the anomalous appearances, as this situation occurred with several other lieutenants in TOS, but speculation also exists the officer might have been demoted or only temporarily promoted.

He assisted chief engineer Scott when the Enterprise was trying to break away from planet Psi 2000 in 2266. (TOS: "The Naked Time")

In security red uniform, he was involved in the search for Lazarus. (TOS: "The Alternative Factor")

Leslie, brent and hadley

Hadley (far right), captured by Khan.

Hadley was on the bridge when Khan Noonien Singh took over the Enterprise in 2267; he passed out after the life support to the bridge was cut, and was seated in a prisoner's row with Leslie, Brent and others, forced to watch Khan's murderous spectacle on the viewscreen. (TOS: "Space Seed")

Brent, Leslie and Hadley were not mentioned as receiving commendations like Uhura, Thule and Harrison, Spinelli and Spock. Its possible Kirk ran out of air before being able to list the entire bridge crew.
Security team, The Devil in the Dark

Hadley (second from left), and the security team.

Hadley was wearing a red operations division uniform, serving on a security team ordered by Lieutenant Commander Giotto to hunt for the Horta, on Janus VI. (TOS: "The Devil in the Dark")

Hadley was working on the upper level of main engineering when Nomad burst in. (TOS: "The Changeling")

Scott relied on Hadley to look up the meaning of the word heater in the ship's language banks. (TOS: "A Piece of the Action")

This was the only occasion in which Hadley was referred to by name.

During the Kelvan takeover of the Enterprise, Hadley was transformed into a crystal form, but was later restored when control was regained. (TOS: "By Any Other Name")

When Daystrom suffered a nervous breakdown Hadley and Leslie took him off the bridge. (TOS: "The Ultimate Computer")

In late 2268, Hadley was present on the bridge during the hunt for Spock's stolen brain. (TOS: "Spock's Brain")

Hadley began wearing no rank insignia in this episode.

Hadley enjoyed socializing with visitors aboard the ship, like Ambassador Petri. (TOS: "Elaan of Troyius")



Background information

Hadley was played by William Blackburn, a regular extra on TOS. He was not named until "A Piece of the Action", when he was called Hadley (while manning the science station in a gold command division tunic). He appeared many times on the original series as this Starfleet officer, the most times of any extra. In wide shots of the Enterprise bridge, Hadley usually appeared, since many of the angle shots used were reuses of master shots filmed while he was on the set of TOS Season 1. (Sometimes, in a continuity gaffe, the back of Hadley's head would appear in wide shots, even though Chekov was supposedly sitting there, in later seasons). He has lieutenant rank when he is in gold, but ensign when in red uniform. Starting with season 3, he was always an ensign, but still often seen wearing lieutenant braid in stock footage.


Hadley was mentioned in Kevin Lauderdale's short story "Devices and Desires" from the anthology Constellations. In the story, Spock was contemplating a transfer from the Enterprise to a top secret Starfleet science station and told Kirk that Lieutenant Hadley would make an "excellent" science officer.

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