Up until now I thought the whole Insidious franchise was lukewarm at best, but now I see I was mistaking: it's far worse than that. This film was a sinking ship that the most talented elements of the first two (Patrick Wilson, Rose Byrne and director James Wan) abandoned before being washed up. Following the money grab of Insidious 3, The Last Key is an unnatural disaster with no coherent storyline, an over-reliance on poor jump scares and so many WTFs that it should be viewed as a comedy.

I LOVE HOW GREAT THESE NEW HORROR MOVIES ARE, not focusing on making your get afraid only, but gives a story that makes your heart beats and your brain burn!

There got to be another chapter, don't think this is the last one, the red face intitiy is still a mystery!!

The order of chapters:
The third
The fourth
The First
The second

Look, I don't usually rate scary movies highly, especially these ones. I know the movie itself has plot holes, at times horrible dialogue, and cheesy resolutions, but the premise behind this movie had a lot of potential. This is the reason for my rating. I kept constantly thinking how different the execution would have been if they had a competent director.

To put it simply:

Idea: A
Execution: D+

I really liked this movie. I do have to say my favorite part is the young version of Alise(sp?). She really sold her emotions very well.

Much better than the third instalment, did a good job of giving Elise a back story. Worth a watch.

Definitely the weakest out of them all so far. But if you enjoy the first three, like i do. It's worth a watch.

Horrible movie at best. Can't believe they made this.

This movie fell short miles away from anything remotely okay. Nothing new. Predictable plot and forced humor. [spoiler] why did the whistle work for Elise when it was meant for her brother? This really annoyed me. [/spoiler]

The best of the series and the only one that I’d watch again.
The last key - 8
Chapter 2 - 7
Chapter 3 - 6
Chapter 1 - 6

Absolutely love this movie, horrors never really scare me but this one did, mostly because it has a deep message that the worst monster are actually humans.

Tying up the series, Insidious: The Last Key is a mediocre horror film that delivers some mild scares. When Elise receives a call from a man living in her childhood home about a malevolent spirit, she decides that it’s time for her to go back and confront her past. Unfortunately the writing isn’t that good, as the plot is chalk full of clichés and tired old tropes. There are also a number of contrivances forced in to connect the film to the previous ones. And the ending doesn’t really make a lot of sense. Still, the ghost investigations and confrontations are pretty intense and suspenseful. Also, the prison setting and creature design for the main villain are kind of creepy. Insidious: The Last Key, while it has its problems, is a fairly solid supernatural thriller that’s about on par with the rest of the series.

Don't put it out with yer boots, Ted..... Nevermind my business Devil-woman!!!

I thought that the monster on the poster was just a bit of cool marketing, but nope. There is literally a ghost in this movie with keys for fingers... Are we to ignore just how stupid that is?! Anyway, the movie is a pretty bland, mediocre exercise of cliches and ineffective jump scares. Still, the end ties the series tougher nicely if they stop making these movies right here. Which they should.