We review all the Klingon episodes! Well at least the ones we remembered.
ENTERPRISE:Broken Bow
Affliction
Divergence

TOS:Errand of Mercy
The Trouble with Tribbles
Day of the Dove

TNG:A Matter Of Honor
Sins of the Father
Redemption Redemption II (Klingon Civil War)
Birthright, Part I Part II (Worf with capured Klingons)
Firstborn (Alexander from the future)

DS9:Blood Oath (Dax kills an albino)
The House of Quark
The Way of the Warrior
The Sword of Kahless
Sons of Mogh (Kurn comes to DS9)
Apocalypse Rising (The crew thinks Garon is a changeling)
Looking for par'Mach in All the Wrong Places (Quark fights for Grilka)
Soldiers of the Empire (Martok pusses out, Work Kicks his ass)
Once More Unto the Breach (Kors last stand)
You Are Cordially Invited

VOY:Barge of the Dead
Lineage (Torres discovers that she is pregnant)
Prophecy (B'Elanna Torres's child is their savior)

MOVIES:Star Trek III: The Search for Spock
Star Trek V: The Final Frontier
Star Trek VI: The Undiscovered Country
Star Trek Generations
Star Trek Into Darkness