Episode:1x26
Errand of Mercy

Jack's Rating:

The Organians intervene in a conflict between the Federation and the Klingons by imposing a peace treaty that will be enforced by the power of the Organians' minds.

Features: The Klingons
Stardate: 3198.4
Air Date: 03/23/67
Director: John Newland

Jack's Review
This is one that, having watched them all in 2006 and 2007, I can honestly say I saw for the first time as an adult. I guess I never saw it in syndication as a kid. It's a terrific episode with action, mystery, and Klingons. Yet another perfect Trek episode!

Episode:2x11
Friday

Jack's Rating:

Attempting to negotiate a mining treaty on Capella IV, the Enterprise crew becomes involved in a Klingon-instigated civil war and must save the pregnant wife of the planet's leader.

Features: The Klingons
Stardate: 3497.2
Air Date: 12/01/67
Director: Joseph Pevney

Jack's Review
This one is a lot of fun. It has one of the best McCoy "I'm a Doctor not a..." lines too. Julie Newmar (Batman's Catwoman) plays a terrific role here as well.

Episode:2x15
The Trouble With Tribbles

Jack's Rating:

When the Enterprise stops at the K-7 space station to pick up a shipment of a new type of grain, trader Cyrano Jones introduces the Enterprise crew to tribbles, cute furry creatures that multiply so rapidly that they almost fill the Enterprise to its seam

Features: The Klingons
Stardate: 4523.3
Air Date: 12/29/67
Director: Joseph Pevney

Jack's Review
Here we have one of the top 5 TOS episodes and easily one of the top Star Trek episodes ever made. It's funny as heck and probably one of the most accessible episodes of the original series - making it a great episode to show anyone you want to introduce to Trek.

Episode:2x19
A Private Little War

Jack's Rating:

The Enterprise crew becomes involved in a civil war on Neural, and must arm the tribe of an old friend of Kirk's in order to maintain a balance of power with the opposing tribe that is receiving arms from the Klingons.

Features: The Klingons
Stardate: 4211.4
Air Date: 02/02/68
Director: Marc Daniels

Episode:3x07
Day of the Dove

Jack's Rating:

When the Enterprise brings aboard Klingon prisoners, an alien entity pits both sides against each other in an ever-escalating struggle.

Features: The Klingons
Stardate: Unknown
Air Date: 10/18/68
Director: Marvin Chomsky

Episode:3x13
Elaan of Troyius

Jack's Rating:

The Enterprise must transport Elaan, the beautiful Dohlman of Elas, to an arranged marriage on the planet Troyius.

Features: The Klingons
Stardate: 4372.5
Air Date: 11/29/68
Director: John Meredyth Lucas

Episode:3x22
The Savage Curtain

Jack's Rating:

Kirk and Spock meet Abraham Lincoln and Surak of Vulcan and must do battle with some of history's most terrible villains.

Features: The Klingons
Stardate: 5906.4
Air Date: 03/07/69
Director: Herschel Daugherty

Jack's Review
This one isn't nearly as bad as folks make out. However, thanks to Presentism the act of judging the past by modern values and standards, it does have a pretty cringe-worthy moment between Lincoln and Uhura. Fortunately her response is Star Trek at its finest - something we could all stand to pay attention to these days.