White Tulip

Fringe S2 Ep18 has to be one of my top three favorite episodes of the series so far. It's well-written, even-paced, and focuses on two characters' similar struggles with a decision they made in the past. Discussions of time-travel and the ever-popular science/god debate are coherent, and the two final scenes at the end are the most amazing gestures of humanity I have ever seen in science fiction!