Introducing Miss Joan Crawford as DELLA (a TV pilot turned movie, kinda)

Originally conceived as a pilot in 1964 called "Royal Bay", the storyline featured an attractive woman, with lots of money, a big house and secrets.  Well you know where that went.  Unfortunately, the pilot went no where.  Left with a vehicle with Joan Crawford (in a non-horror film role), the powers that be decided to add in some of outtakes and retitled the movie after Crawford's character, DELLA.