Most heart breaking moments on kid's TV????

[Floogal]

What are your most heart breaking moments on kid's TV? It can be either from modern day kids TV or from when you were growing up. Mine are:
*On Topsy and Tim. When Tim goes to his 'friend' Tony Welsh house. Tony and his new mate completely ignored Tim. You can see him crying inside until Tony's dad invited him to help out in the garden.

• On Old Jack's boat Christmas special. When he thinks all his friends are too busy to meet up to commemorate his dead wife. Yet they all surprise him at the end for a proper sing song

Most of everyone's suggestions so far made me fill up but I was always called a "sensitive child" . As an adult I can't listen to the song "remember me " from Coco without ugly crying.

So many of the ones mentioned here already...

Toy Story 2 - when poor Jessie gets dumped
The end of Coco
Most of Inside Out
The Snowman

I remember the shock of Danny Kendall...didn't he drown during a swimming lesson?

Danny died in the back of Bronson's car. Jeremy Irvine drowned in the pool.

@Ronnie887
Thank you I had a feeling that wasn't right! I remember the swimming pool death more clearly.
I absolutely loved Grange Hill. I even had my hair cut like Imelda.

People getting nostalgic over The Littlest Hobo need to listen to Kate Rusby's wonderful cover of the theme tune. You might get a bit of a lump in your throat though.

One that's upset me my whole life is The Snowman melting. I had a Royal Dalton Snowman figurine as a child which I was obsessed with until one day it was accidentally smashed. So when James is heartbroken, I really feel that heartbreak because I lost my snowman too.

I know it's a silly cartoon, but on Nate is Late. When his best friend Malika thinks he's lost forever in another dimension. And she just breaks down and cries