They had run out of milieus in which to put the Angels, even when they let go of the much held earlier stipulation that the Angels got the case because it needed women to go undercover to solve it and not men, and even when they were in Hawaii.

During the Shelley Hack season (Season 4), they ended up using unfilmed scripts for several episodes that had been written previously with Kate Jackson in mind, and that’s why one reason the writing is all over the place in that year.