I agree with all your sad moments! Last night I was blown away by the new Studio 60 episode, K&R, Pt. 1. It's a shame now that the show is canceled, that Sorkin is really getting in touch with his "rip your heart out" writing. I was actually thinking about West Wing and Sports Night as I was watching it.

I second the West Wing episode where Mrs. Landingham dies, and the one where Mark Harmon dies.

Firefly, Objects in Space. It's just so sad when we think River's actually going to leave to save everyone from herself.

Farscape, the final episode (pre Peace Keeper Wars) where Crichton and Aeryn are blown up.

Stargate Atlantis - Sunday. I didn't realize that the hardest part about being spoiled for this episode was going to be that I was actually afraid to watch it. But I did, I cried.

Dark Angel - I just caught the rerun of the episode where Jessica Alba has to kill her brother, Ben, and he's Jensen freakin' Ackles! A multi-hankie moment.

Supernatural - Dean sells his soul to bring Sam back to life.

Stargate SG-1 - The first time Daniel dies and O'Neill is distraught. Also, the episode where O'Neill and Carter might die because they don't realize they're lying about the time he couldn't leave her behind.

Doctor Who - When the Doctor says goodbye to Rose.