Re: Best feature length, and/or two part, episode?
Besides the obvious ones BoBW, AGT, and CoC, I think Redemption is extremely underrated.
I agree with you on that. It was a great character piece for Worf and established a host of continuity and recurring characters in Gowron, Kurn and the Duras sisters. I could've done without the Sela nonsense though.
"I was never a Star Trek fan." J.J. Abrams