The episode order from the official Seven Days website is:

Season One:

Pilot
Come Again
Doppleganger
Gettysburg Virus
Vows
Shadow Play
Last Card Up
Last Breath
Parkergeist
Daddy's Girl
As Time Goes By
There's Something About Olga
Act of God

Season Two:

The Cure
Playmates and Presidents
Mr. Donovan's Neighborhood
Witch Way to the Prom?
Pope Parker
X-35 Needs Changing
The Cuban Missile
Space Station Down
Deja Vu All Over Again
The Backstepper's Apprentice
Brother, Can You Spare a Bomb?
Buried Alive
Time Gremlin
The Devil & The Deep Blue Sea
Love and Other Disasters
The Collector
Sister's Keeper
Two Weddings and a Funeral

Season Three:

The Fire Last Time
Deloris Demands
Olga's Excellent Vacation
The Dunwych Madness
Rhino
Peacekeepers
Stairway to Heaven