Your five best/worst Star Trek episodes

[Delta Vega]

Five best

Balance of Terror
The Enemy Within
Amok Time
The Corbomite Maneuver
The Tholian Web

Five worst

A Piece of the Action
Patterns of Force
Spocks Brain
Fridays Child
Bread and Circuses

But hey, it changes all the time, mood depending

 

[Ssosmcin]

Like you, mine change with mood as well, but the top two always remain constant:

Best:

The Doomsday Machine
Where No Man Has Gone Before (unaired)
The Man Trap
Day of the Dove
The Tholian Web

Worst:

And the Children Shall Lead
Mark of Gideon
The Cloud Minders
A Piece of the Action
Charlie X

 

[Vasquez Rocks]

Best:

Amok Time
The Conscience of the King
The City on the Edge of Forever
A Taste of Armageddon
Bread and Circuses

Worst:

The Mark of Gideon
Friday's Child
Wink of an Eye
Spock's Brain
And The Children Shall Lead

 

[Captain Tracy]

BEST:
Where No Man Has Gone Before
Balance Of Terror
Court Martial
The Corbomite Maneuver
Doomsday Machine

WORSE:
The Empath
Turnabout Intruder

Those are the only two, as even so-called 'Bad Trek' is better than no Trek at all.

 

[BillJ]

It's easier to just ask me which of my kids are my favorite.

 

[Starpaul20]

BEST:
Balance of Terror
The Corbomite Maneuver
The Doomsday Machine
The Trouble with Tribbles
The Conscience of the King

WORST:
Spock's Brain
And The Children Shall Lead
Charlie X
The Empath
The Way to Eden

 

[Delta Vega]

Honourable mention to the girl in the tinfoil bikini in The Gamesters of Triskellion

 

[AtoZ]

For me these lists are mostly ever changing, so I caution all that I consider Star Trek to have "79 gems of varying luster", and that my list of "best" doesn't necessarily suggest "most fun". "Worst" does change for me somewhat, but I usually list "Plato's Stepchildren" as the worst, most embarrassing of the lot.

"Best" or current favorites:

"The City on the Edge of Forever"
"Tomorrow is Yesterday"
"Mirror Mirror"
"The Doomsday Machine"
"Spectre of the Gun"

"Worst" or current non-favorites:

"Plato's Stepchildren"
"The Lights of Zetar"
"The Mark of Gideon"
"Mudd's Women"
"Let That be Your Last Battlefield"

 

[Admiral Shran]

Best:
Journey to Babel
The Conscience of the King
Arena
The Devil in the Dark
The Enterprise Incident

Worst:
And the Children Shall Lead
Spock's Brain
Mudd's Women
The Alternative Factor
Plato's Stepchildren

 

[Lucky]

Best

1. The City on the Edge of Forever
2. Mirror Mirror
3. The Doomsday Machine
4. Balance of Terror
5. Space Seed

Honorable mentions go to Dagger of the Mind and The Changeling.

Worst (in no particular order)

The Empath
And the Children Shall Lead
Spock's Brain
The Way to Eden
The Alternative Factor

 

[A.V.I.A.F.]

Best:
1. The Enterprise Incident
2. Errand of Mercy
3. The Doomsday Machine
4. City on the Edge of Forever
5. Court Martial

Worst:
1. Catspaw
2. Whom Gods Destroy
3. The Menagerie Part I
4. The Menagerie Part II
5. Catspaw (it's so bad it should be mentioned twice!).