Ice on Mars
Star Trek Voyager s1e02, "Parallax"
In the second THRILLING episode of Voyager, B'elanna punches a guy and gets promoted! Also, effect precedes cause! So really B'elanna gets promoted and punches a guy? It's all very confusing, and you'd have to be Janeway to understand. Luckily, SHE IS IN THIS EPISODE! Featuring multiple Voyagers!
This is one episode you'll certainly feel follows after the pilot!