Here's a list of episodes that I gave to a friend of mine after I convinced him to watch DS9. He wasn't much into Star Trek, loved BSG, and I thought he'd enjoy some Ronald Moore worked on before that had some of the qualities in BSG. However, I suspected that he wouldn't sit through all the episodes, and I had read people who were looking forward to a serialized show were often disappointed with the first two seasons (I think it was even the subject of a podcast, but I can't remember where). I just noticed the same complaint raised in a General Discussion thread. Anyone, I tried to distill the story down to 60-70 episodes, not all of them necessarily the best, but the ones that, IMO, tell the story.
Emmisary
The Nagus
Duet
In the Hands of the Prophets
Cardassians
Necessary Evil
The Maquis I and II
Whispers
The Wire
The Collaborator
The Tribunal
The Jem'hadar
The Search I and II
Second Skin
Defiant
Heart of Stone
Destiny
Improbable Cause/The Die is Cast
The Way of the Warrior
The Visitor
The Sword of Kahless
Homefront/Paradise Lost
Return to Grace
Bar Association
Accession
Hard Time
For the Cause
To the Death
The Quickening
Broken Link
Looking for Par'mach in All the Wrong Places
Nor the Battle to the Strong
Things Past
Rapture
For the Uniform
In Purgatory's Shadow/By Inferno's Light
Blaze of Glory
In the Cards
Call to Arms
A Time to Stand
Rocks and Shoals
Behind the Lines
Favor the Bold
Sacrifice of Angels
Waltz
Who Mourns for Morn?
Far Beyond the Stars
Change of Heart
Inquisition
In the Pale Moonlight
Tears of the Prophet
Image in the Sand
Shadows and Symbols
Treachery, Faith and the Great River
The Siege of AR-558
It's Only a Paper Moon
Inter Arma Enim Silent Leges
Penumbra
Til Death Do Us Part
Strange Bedfellows
Changing Face of Evil
When It Rains
Tacking into the Wind
Extreme Measures
Dogs of War
What You Leave Behind
Emmisary
The Nagus
Duet
In the Hands of the Prophets
Cardassians
Necessary Evil
The Maquis I and II
Whispers
The Wire
The Collaborator
The Tribunal
The Jem'hadar
The Search I and II
Second Skin
Defiant
Heart of Stone
Destiny
Improbable Cause/The Die is Cast
The Way of the Warrior
The Visitor
The Sword of Kahless
Homefront/Paradise Lost
Return to Grace
Bar Association
Accession
Hard Time
For the Cause
To the Death
The Quickening
Broken Link
Looking for Par'mach in All the Wrong Places
Nor the Battle to the Strong
Things Past
Rapture
For the Uniform
In Purgatory's Shadow/By Inferno's Light
Blaze of Glory
In the Cards
Call to Arms
A Time to Stand
Rocks and Shoals
Behind the Lines
Favor the Bold
Sacrifice of Angels
Waltz
Who Mourns for Morn?
Far Beyond the Stars
Change of Heart
Inquisition
In the Pale Moonlight
Tears of the Prophet
Image in the Sand
Shadows and Symbols
Treachery, Faith and the Great River
The Siege of AR-558
It's Only a Paper Moon
Inter Arma Enim Silent Leges
Penumbra
Til Death Do Us Part
Strange Bedfellows
Changing Face of Evil
When It Rains
Tacking into the Wind
Extreme Measures
Dogs of War
What You Leave Behind