Final Episode seems to be  one of those iris that rebloom when it has an extended period of warm weather while in a mature state. A class of rebloomers  that  are basically "prefernial vernalization" as versus "Obligatory vernalization".

Obligatory vernalization means that the plant has to have vernalization before blooming.  Preferntial vernalization  have a secondary sytem, that enables it to rebloom when it has had a long period  while sitting at  maturity. These types will rebloom in Australia and California, but not else where. 

So breeding with it  will perhaps produce California rebloomers, but unles you live in a climate that has an apropriate long warm growth period, it won't contribute much to a rebloom program.

Chuck Chapman