Hey @Daniel_R! 

The big blocker in your way here is that Airtable's array formulas do not treat multi-select fields as arrays. They're treated as flat strings.

The only straightforward way I can think of for you to be able to get the desired data output you're looking for is to restructure your data to utilize linked records.
This will allow you to utilize rollups to build the desired output you're looking for.
Luckily, the data you're working with fits really cleanly into a new data structure.

I created a base for you to take a peek at the concept. It can be viewed from this shared base link.

I broke the data into three tables: shows, seasons, and episodes.
I populated it with a bunch of data for the sake of the example.

The final result is that we can build a rollup on the Shows table that returns a value like what is pictured below:

I would definitely advise that you copy the base I linked and play around with it yourself.
As a rule of thumb, I generally advise against the use of multi-select fields. They are evil and cause some massive headaches when working with scaled data.

@Ben_Young1 Thank you for the thoughtful reply.

I had a feeling this would not be possible due to the array handling.  However, changing the data structure for my use case is something that cannot be done. The input is coming from a Jotform, so if there isn't a way to extract each instance in the array then loop I may be stuck.

Hm, what if you substituted the commas with the format you wanted like so?

Exactly what I was looking for. Thanks @TheTimeSavingCo