It was quite chaotic and not some certain storyline episode. I think they wanted us to see Abby's road to bottom as it looks like where she is coming and maybe they also wanted to make some fun but it did not worked as those jokes they were not funny.
I am very glad the storyline with that little boy who Gates met in ICU continues as this really added depth and motion to this episode. Without it, this episode would have been awful.
And the case with that girl who had all the kind of symptoms.. It was weird but interesting. The way Sam figured out what was going on.