Classic scene from The Wonder Years Pilot episode. The family has just learned Winnie Cooper's brother Brian was killed in the Vietnam war.
NARRATOR (originally voiced by Arye Gross, known as a regular on the Ellen (DeGeneres) show, but later replaced by Daniel Stern): That night I decided to go for a walk. The days were still long and back then... Kids could still go for walks at dusk without the fear of ending up on a milk carton. I went down to the big climbing tree in Harper's Woods.
I didn't admit it to myself until years later...
But in my mind was the shadow of a thought that Winnie might be there.
She was sort of hugging herself, and rocking slowly back and forth. There was a bit of a chill in the air and she didn't have a sweater.
For a minute I was scared to approach her.
I didn't know what to say.
I had the strangest feeling.
It was impossible for me to believe - Brian was dead.
KEVIN (Fred Savage): I'm sorry...about Brian...and I'm sorry...about what I said today. It wasn't true.
WINNIE (Danica McKellar): I know.
NARRATOR: It was the first kiss for both of us. We never really talked about it afterward. But I think about the events of that day again and again and somehow I know that Winnie does too. whenever some blowhard starts talking about the anonymity of the suburbs, or the mindlessness of the TV-generation. Because we know that inside each one of those identical boxes...
With its Dodge parked out front, and its white bread on the table, and its TV set glowing blue in the falling dusk...
There were people with stories, there were families bound together in the pain and the struggle of love. There were moments that made us cry with laughter, and there were moments, like that one, of sorrow and wonder.
(Transcript adapated from fansite http://mytwyyearbook.tripod.com/epsum.html)
Years later, Danica McKellar remarked on shooting this scene: My first kiss was a pretty nerve-wracking experience! But we never kissed off screen, and pretty quickly our feelings turned into brother/sister, and stayed that way.