Originally Posted by Psy-Fi

I've only seen the original series and have probably seen every episode from the original series a dozen times each or more over many years beginning in my early teens. So many great episodes. I had to check IMDb to refresh my memory but in addition to all of the original series episodes mentioned so far...

The After Hours
A Most Unusual Camera
A Penny for Your Thoughts
The Changing of the Guard
The Four of Us Are Dying
The Fugitive
The Howling Man
I Shot an Arrow into the Air
The Lonely
Long Live Walter Jameson
The Masks
Nick of Time
Nothing in the Dark
Number 12 Looks Just Like You
The Shelter
Stopover in a Quiet Town

Probably a lot more I'm forgetting at the moment but the entire run is worth watching from beginning to end.