The Four Critical Questions of Babylon 5:
Who are you?
What do you want?
Why are you here?
Where are you going?

Absolutely stunning and inspiring television. This was the first TV show (first American one, at least) to use a strong pre-planned story arc, which series creator J. Michael Straczynski has said came to him in the shower one night. He spent the next ten years writing it all down, and the result is five seasons of art on television. It makes you CARE about the characters--and sometimes the ones that capture your imagination are the ones you'd least expect.

Main Cast (from you know where)
Michael O'Hare as Commander Jeffrey Sinclair/Valen (1994-1995)
Bruce Boxleitner as Captain/President John Sheridan
Claudia Christian as Lt. Commander/Commander Susan Ivanova
Jerry Doyle as Security Chief Michael Garibaldi
Mira Furlan as Delenn
Richard Biggs as Chief Medical Officer Stephen Franklin, M.D.
Bill Mumy as Lennier
Stephen Furst as Vir Cotto
Andrea Thompson as Talia Winters (1994-1995)
Jason Carter as Ranger Marcus Cole (1995-1997)
Tracy Scoggins as Captain Elizabeth Lochley (1998)
Julie Caitlin Brown as Narn Attaché Na'Toth (I) (1994, 1998)
Mary Kay Adams as Narn Attaché Na'Toth (II) (1994)
Robert Rusler as Lieutenant Warren Keffer (1995-1996)
Jeff Conaway as Sargeant/Security Chief Zack Allan
Patricia Tallman as Lyta Alexander (1995-1998)
Andreas Katsulas as Narn Ambassador G'Kar
Peter Jurasik as Centauri Ambassador/Emperor Londo Mollari

Notable Supporting Cast and Recurring Guests
Ardwight Chamberlain as Vorlon Ambassador Kosh Naranek (1994-1996)
Joshua Cox as Lieutenant David Corwin
Walter Koenig as Psi Cop Alfred Bester
Gary McGurk as Vice-President/President Morgan Clark (1994-1997)
Ed Wasser as Mr. Morden (1994-1997)

Refer to the Babylon 5 Episode Guide for more info about specific episodes.