This is what Fox continues to do with "The Simpsons," now in its 36th season, and how NBC has rolled with its "Law & Order" franchise. This makes CBS' decision to retire "Hawaii Five-0" while it ...

Only ET was with the two casts talking about their highly anticipated crossover episode! 'Hawaii Five-0's season nine finale airs Friday, May 17, at 10 p.m. ET on CBS.