This was such a heartbreaking episode to watch. It must be so difficult for the parents to see such tiny babies with all the wires and tubes. It really brought home to me how much courage and patience the parents suddenly have to find, to cope emotionally, when in reality the time they have to gear up for that experience is so limited.
Coincidentally, I've just been watching the rerun of Laverne Antrobus' two-parter "Growing Babies" which, amongst other things, included an interview with someone (I think it was Dr Als) who pioneered some improved techniques in the care of premature babies. In the past I've seen quite a bit of filming done in SCBUs, but it never occurred to me to question why incubators often have quilts or blankets over the top. Apparently that's to muffle the sensory input (lights and sound) to the baby, so as not to overload the premature frontal lobe of the brain. (I think I've got that right.) And it seems Dr Als also pioneered the "kangaroo" approach.
That's just made me think about what can be shown on film, i.e. the intervention techniques are pretty easy to show as we saw, but it's incredibly difficult to show the knowledge that SCBU staff must have. But then this series is about the emotional journey people travel rather than an academic expository series.
One thing I did notice was when Izzie left hospital it was from Winchester rather than Southampton. I don't recall any explanation as to why Izzie was transferred, though the whole problem of availability of SCBU/neonatal beds might have been one the producers didn't want to get into.