The original BBC broadcast order is pretty wild, although does have the benefit of actually starting with WNMHGB and front-loads a bunch of strong episodes.
Towards the end they start repeating episodes along with new unaired episodes, and infamously didn't show
Plato's Stepchildren, The Empath, and W
hom Gods Destroy until the nineties.
The show was regularly repeated throughout the seventies and eighties, but
Miri was deemed unsuitable after the 1970 TX and had to wait until 1992 to have a second BBC broadcast.
1969-07-12: Where No Man Has Gone Before
1969-07-19: The Naked Time
1969-07-26: The City On The Edge Of Forever
1969-08-02: A Taste Of Armageddon
1969-08-09: Mudd's Women
1969-08-16: Tomorrow Is Yesterday
1969-08-23: The Menagerie Part 1
1969-08-30: The Menagerie Part 2
1969-09-06: The Devil In The Dark
1969-09-13: Charlie X
1969-09-20: Shore Leave
1969-09-27: Space Seed
1969-10-04: The Man Trap
1969-10-11: Dagger Of The Mind
1969-10-18: The Corbomite Manoeuvre
1969-10-25: Balance Of Terror
1969-11-01: The Squire Of Gothos
1969-11-08: What Are Little Girls Made Of?
1969-11-15: Arena
1969-11-22: The Return Of The Archons
1969-11-29: This Side Of Paradise
1969-12-06: The Doomsday Machine
1969-12-13: Errand Of Mercy
1969-12-20: The Conscience Of The King
1969-12-27: The Galileo Seven
1970-04-06: 19.10: Court Martial
1970-04-13: 19.10: The Enemy Within
1970-04-20: 19.10: Catspaw
1970-04-27: 19.10: Who Mourns for Adonais?
1970-05-04: 19.10: The Apple
1970-05-11: 19.10: Metamorphosis
1970-05-18: 19.10: Wolf In The Fold
1970-05-25: 18.15: The Changeling
1970-06-01: 19.10: The Trouble with Tribbles
1970-06-08: 19.10: Bread And Circuses
1970-06-22: 19.10: Journey To Babel
1970-06-29: 19.10: The Deadly Years
1970-07-06: 19.10: A Private Little War
1970-07-13: 19.10: Obsession
1970-07-20: 19.10: By Any Other Name
1970-07-27: 19.10: I, Mudd
1970-08-03: 19.10: Patterns Of Force
1970-08-10: 19.10: The Immunity Syndrome
1970-08-17: 19.10: Return To Tomorrow
1970-08-24: 19.10: The Omega Glory
1970-09-07: 19.10: A Piece of the Action
1970-10-07: 19.20: The Ultimate Computer
1970-10-14: 19.20: Friday's Child
1970-11-04: 19.20: Assignment: Earth
1970-11-11: 19.20: Mirror, Mirror
1970-11-18: 19.20: The Gamesters of Triskelion
1970-11-25: 19.20: Amok Time
1970-12-02: 19.20: Miri
1970-12-09: 19.20: Operation -- Annihilate!
1970-12-16: 19.20: The Empath [not shown, replaced by The Paradise Syndrome]
1970-12-30: 19.20: Requiem for Methuselah
1971-01-06 19.20 All Our Yesterdays
1971-01-13 19.20 Day of the Dove
1971-01-20 19.20 The Way To Eden
1971-01-27 19.20 Let That Be Your Last Battlefield
1971-02-03 19.20 Wink of an Eye
1971-02-10 19.20 The Cloud Minders
1971-02-17 19.20 Where No Man Has Gone Before (2)
1971-02-24 19.20 A Taste Of Armageddon (2)
1971-03-03 19.20 Mudd's Women (2)
1971-03-10 19.20 Tomorrow Is Yesterday (2)
1971-03-17 19.10 The Devil In The Dark (2)
1971-03-24 19.10 Shore Leave (2)
1971-03-31 19.10 Space Seed (2)
1971-04-07 19.10 The Corbomite Maneuver (2)
1971-04-14 19.10 The Squire Of Gothos (2)
1971-09-15 19.25 Spectre of the Gun
1971-09-22 19.25 Elaan of Troyius
1971-09-29 19.25 The Enterprise Incident
1971-10-06 19.25 And the Children Shall Lead
1971-10-13 19.25 Spock's Brain
1971-10-20 19.25 Is There in Truth No Beauty?
1971-10-27 19.25 For the World is Hollow and I Have Touched the Sky
1971-11-03 19.25 That Which Survives
1971-11-10 19.25 The Mark of Gideon
1971-11-17 19.25 The Lights of Zetar
1971-11-24 19.25 The Savage Curtain
1971-12-01 19.25 The Tholian Web
1971-12-08 19.25 The Alternative Factor
1971-12-15 19.25 Turnabout Intruder
1971-12-22 19.25 What Are Little Girls Made Of? (2)
1971-12-29 19.25 This Side Of Paradise (2)
This is the first of what will probably be several long updates about Star Trek episodes and their repeats on the BBC. The recently launch...
space-doubt.blogspot.com