Characters who recurred in TOS
- Amanda Grayson (played by Jane Wyatt)
- Christine Chapel (played by Majel Barrett)
- DeSalle (played by Michael Barrier)
- John Farrell (played by Jim Goodwin)
- Galloway (played by David L. Ross)
- Harper (played by Sean Morgan)
- Kyle (played by John Winston)
- Lemli (played by Roger Holloway)
- Leslie (played by Eddie Paskey)
- Angela Martine (played by Barbara Baldavin)
- Harry Mudd (played by Roger Carmel)
- O'Neil (played by Sean Morgan)
- Janice Rand (played by Grace Lee Whitney)
- The Federation's computer voice (played by Majel Barrett)
Characters who recurred in other series
- Kang
- Kor
- Sarek (played by Mark Lenard)
See Also
- List of TOS recurring character appearances