Guest Stars
Branch
+ 2273 / Epsilon IX Monitoring Station
human, male
2273 - Commander - CO - Epsilon IX Monitoring Station
He was the commander of the Epsilon IX station that was destroyed when the V'Ger probe returned to Federation space
Star Ttrek 1: The Motion Picture
Actor: David Gautreaux
Cmdr. Branch was never referred to by name in the film, but his name was in the credits. Just before Star Trek I began production, actor David Gautreaux had been cast in the role of Cmdr. Xon, science officer aboard the Enterprise for the proposed television series Star Trek II. When the first episode of this series became ST The Motion Picture, the character of Xon was eliminated and Gautreaux was recast as Branch

Beach
human, male
2285 - Commander - Chief Engineer - USS Reliant
He was an officer of the Starship Reliant under the command of Captain Clark Terrell in 2285
Star Trek 2: The Wrath of Khan
Actor: Paul Kent

Robert Bennett
human, male
2287 - Fleet Admiral - Starfleet Chief of Staff
Bennett assigned Kirk and the Enterprise-A to rescue Federation Representative St. John Talbot at planet Nimbus III, despite the fact that the Enterprise was far from operational at the time
Star Trek 5: The Final Frontier
Actor: Harve Bennett
This character had no last name in the movie or the script, but he's called "Admiral Bennett" because he was played by Star Trek feature film writer/producer Harve Bennett, making a cameo appearance

Bill  ?
human, male
2293 - Fleet Admiral - Chief-in-Command - Starfleet Headquarters
Star Trek 6: The Undiscovered Country
Actor: Leon Russom
Leon Russom also played Admiral Toddman in DS9 The Die is Cast

Reginald Barclay
human, male
2366 - Lieutenant JG - Engineering Officer - USS Zhukov
2366-2370 - Lieutenant JG - Engineering Officer - USS Enterprise-D
2373 - Lieutenant - Engineering Officer - USS Enterprise-E
2376-2377 - Lieutenant - Communications Research Center, Sol Sector
[2403 - Commander - Starfleet Academy]
Star Trek 8: First Contact
Actor: Dwight Schultz

Hars Adislo
bolian, male
2375 - Lieutenant - Science Officer - USS Enterprise-E
Hars Adislo wrote a research paper on thermionic transconductance, which he presented at the Nel Bato Conference in 2374
Star Trek 9: Insurrection
Actor: John Hostetter