That was actually much, much worse than I had been led to believe.  I loved the first two to little shredded pieces when I was wee: Indy has Doctor-level fondness booked into my brain for all eternity.  And Harrison Ford is fine; the 'old man' thing isn't a problem. I still would.  Plus motorbikes in libraries, and really absurdly lengthy car chases, and aaaaaaaaaaaants eating people aliiiiiiiiiiiiiiive.  All these are good things.

But OH YE GODS the plot the plot.  WTF were they thinking?   It is an Indy film.  I do not wish to hear the phrase 'No, they're interdimensional beings!' 

And what was the point of the FBI people at the start, who then completely vanished?  Or the nuclear bomb testing (followed by casual reference to Oppenheimer), which I kept thinking would be a huge part of the Sinister Plot, or at least receive some kind of 'ooer, nuclear bombs are worrying, aren't they kids?' - but no.  They just felt like having Indy fly through the air in a fridge.  Although I have learned that communists are Bad.  It's not really clear whether they're more Bad than interdimensional beings (who might not be Bad, actually, because they like archaeology which is Good), but at least one of them was Bad because she had an evil haircut.  She also sought 'knowledge', took bonkers risks to do so, and was such a despicable heathen when it comes to valuable artefacts that she just cut one open with a knife, ruining it forever!  Indy would never do such a thing.  Oh, hang on...

Magnificent end scene.  Although I am disappointed that Chewbacca didn't get a medal too.