This was definitely a memorable episode—inside Melinda’s memories, no less! While the events probably didn’t take place with Emma’s involvement, we have every reason to believe what we saw accurately described Morgan’s fate—explaining while Melinda is such a sourpuss.
But with a backstory like that, we figure she’s totally earned it. Merlin seems to have taken things pretty hard too, and he’s had a long life to become accustomed to tragedy. How sad.