Ditto on the Best of Both Worlds cliffhanger.
I remember watching it...I was about 10...and I was thinking "no way do they let it end like this."
And Picard delivers his line...and I'm in shock...and Riker says "Mr. Worf....fire."
And I'm thinking "**** this is going to own."
TO BE CONTINUED
And I screamed out loud. I was so ****ing infuriated.