Star Trek Expanded Universe

"Main's Brain" is the third episode of the first season of the Frontier Fleet: USS Calhoun series. It is the continuation and conclusion of the previous two episodes, within the early season one story arc.


Commander Fox D. Main was retrieved and taken back to the ship. It was found that his inexplicable behaviour was due to a brain parasite. Chief medical officer Rovan Bren and Captain Sera Vaun, a qualified doctor, attempted surgery. The surgery was successful, but the parasite's attempt to transfer to Captain Vaun killed her.

The ship reached Talax, where it received necessary repairs. With the captain dead and the first officer recovering from his ordeal, Doctor Bren assumed command and conducted diplomatic overtures with the Talaxians, successfully establishing friendly diplomatic relations on behalf of the Federation. Its first mission accomplished, the Calhoun returned to the Alpha Quadrant.


  • Captain Vaun died in this episode. She would appear again only once, briefly, in episode 1x16 "Shadows of Time", when the crew of 2390 was brought into contact with the crews of three periods from the Calhoun's future.
  • This episode did not initially have a title, and only acquired it retroactively in 2008, when all past episodes were given titles.
  • This episode's posts are missing from the archives, which only begin mid-way during episode 1x05 "The Parting of the Ways". "Main's Brain" is thus one of the Calhoun's four and a half "missing episodes".


Initial Season 1 cast and crew[]

  • Clare BRADLEY as Captain Sera VAUN
  • Guido DORSSERS as Commander Fox D. MAIN
  • Derek PEARS as Chief Medical Officer Rovan BREN
  • Brandon ALLARD as Consul Devon TORLITH
  • Bram PEETERS as Chief of Science Jim JANSSENS
  • Jonathon HARGAN as Chief Engineer Jason BUAGH
  • Melinda MARTIN as Chief Counsellor Laoise O'CEALLAIGH
  • Jaap MARSMAN as Assistant Chief Medaical Officer Jerok NOVIA
  • Rob VERLINDEN as Chief of Security LOGIX
  • James CECIL as Assistant Chief Counsellor Michael A. STONEWALL
  • Frank ROGERS as Ambassador DELEANE

Command team for this episode[]

  • captain: Sera Vaun (until death)
  • first officer: Fox D. Main
  • second officer: Rovan Bren