Top 5 time travel episodes?

[Degobunny]

Time Travel:
The Visitor
Trials and Tribbulations
Tapestry(kinda both time travel and alternate reality)
Past Tense
Time's Arrow

Alternate Realities:
Mirror, Mirror
Far Beyound the Stars
All Good Thing's...
Yesterday's Enterprise
The Inner Light

 

[maneth]

The City on the Edge of Forever
Trials and Tribble-ations
Carpenter Street
Year of Hell

In general, I'm not too fond of time travel episodes, especially those with a built-in reset.