Executive producer Jane Tranter offers more details on the episode she had to cut because of the pandemic.
James McAvoyreturned to Wales in March to film a special episode ofHis Dark Materials.
Then the pandemic hit.

HBO
“That missing episode [took place] three days before the start of season 2.
So you flash back three days and then you catch up with where season 2 started.”
It’s very intwined with all the mythology of that world.
So, I don’t know."
Either way, this isn’t the last we’ve seen of Asriel.