Star Trek and Time Travel (The Meaning of Star Trek)

What is the meaning of time travel on Star Trek?

How could the science and technology of time travel actually work?

Noted science fiction scholar and technologist Alan Shapiro answers these questions. He considers in detail the physics of time travel, and analyzes the following Star Trek episodes:

“The City on the Edge of Forever,” “All Our Yesterdays,” “The Savage Curtain,” and “The Trouble With Tribbles” from The Original Series.

“The Best of Both Worlds” and “The Inner Light” from The Next Generation.

“Emissary,” “Duet,” “Hard Time,” and “Trials and Tribble-ations” from Deep Space Nine.

“Year of Hell,” “Before and After,” “Bliss,” “Jetrel,” and “Eye of the Needle” from Voyager.