This review contains spoilers.
After the whole plot of Magnum seemingly dying at the end of season seven, and coming back to life at the start of this final season, 'Innocence... A Broad' sees things settling back down into a more familiar 'Magnum, p.i.' fare.
In fact, other than for the odd reference of Magnum's (near) death, this episode could easily have come from any of the earlier seasons of the show's run.
Janis Ward is good fun as the glamorous but downtrodden Rita, who joins Magnum on his investigation, and unlike some of the show's other one-off female guest stars (Cassie Yates, anyone?) does not come across as too annoying.
The plot is silly, and – as some have said – predictable, but at the same time, it is great fun, and I really like this episode. Compared to some of MPI's clever, sophisticated stories, it is pretty straightforward, but that doesn't matter, as it is hard not to like this one, especially with it's many good lines and humorous moments, such as Higgins teaching Zeus and Apollo hand commands, Magnum's bug mask to scare Rick, and lots of great lines (Rita to Magnum: "Do you supply a gun, or should I bring my own?").
Combined with that, there is a reasonably decent case to investigate – and even has a well-shot car chase, the sort of things that is often absent from these later examples of MPI.
At one point towards the end, the story does seem to make a coincidental connection, as Rita's obnoxious husband Joe turns out to seemingly be in cohorts with the mob boss who is behind all the trouble that Magnum and Rita are investigating. However, in the last scene, Joe explains that as part of his business, he makes it a habit to pay the local mob to leave him alone, which is why he was meeting the mob boss, so maybe it wasn't such a coincidental plot point after all. But at the time it seemed like a tenuous connection.
With that explained, the only real thing that doesn't quite about this story is after the climax, like there was a section missing; after Joe comes good and drives up in the garbage truck for Magnum and Rita to escape the mobster thugs in, we suddenly cut to the final scene on the Estate, being told how the mob guys are now in jail. Personally, I would have liked to have seen an in-between scene of how Magnum captured the thugs; but I suppose you can only fit so much into a 48-minute episode!
On a sad note, this was the last episode to be scored by Pete Carpenter, who passed away a few days after it was originally aired. With partner Mike Post, they wrote many classic TV themes ('The Rockford Files', 'The A-Team', etc.); Post would continue to score the show alone for the rest of its run.
Anyway, all in all – I really like this one. As I said above, yes it's silly and predictable, but at the same time it's really good fun, and one that I can watch over and over again. I know some may argue that it doesn't deserve such a high 9.5 rating, but personally I think it is one of the best of the final season.