Amongst Indiana Jones fans, Kingdom of The Crystal Skull is frequently called the worst in the series, I as a big Indy fan don't agree with that.
Kingdom of the Crystal Skull is set 19 years after The Last Crusade and picks up in 1957 where Indy is now searching for his friend and former colleague Harold Oxley who disappeared while find the legendary Crystal Skulls. He meets his son, Mutt and is reunited with Marion Ravenwood, his former flame.
The big criticism is that the film is too out there to be an Indiana Jones film, that is totally bogus. The first three films featured more far fetched ideas than anything presented in KOTCS, for instance in Raiders Nazi's head are melted by ghosts coming out of the Ark of the Covenant, Temple of Doom features even more far fetched ideas like Mola Ram pulling a man's heart out, a giant fire pit, and other things. Last Crusade features a fight on top of a tank, a knight over one thousand years old who presumably hadn;t had a bite to eat in over a thousand years.
The concept of the inter-dimensional beings is the thing most fans say is too far fetched and ruins everything, the movie is set in the 1950's so not having something like that would be impossible and like the other three films this is supposed to be a homage to b-films.
Not too old to wear the hat.
Harrison Ford is certainly still able to play the character as he did all his own stunts for the film and looked incredibly fit for his age. The return of Karen Allen was another good thing about the film as we hadn't seen her character since Raiders. I actually really like Shia LaBeouf as Mutt Williams, he's not a Marlon Brando knock off and I think he can act despite what people say. I want to see more of his character in the next film but I'm still not convinced he's ready for the fedora just yet.
I liked the character of Mac but the problem I had with him was that I still don't know if he's really a villain or a hero. The main villain, Colonel Doctor Irina Spalko is merely passable as a villain, she has nothing special about her but she isn't terrible.
Kingdom of The Crystal Skull gets a bad rap from people and I still enjoyed as much as the first three and consider it on par with those films. It impressed me enough to want a fifth film and I'm looking forward to it.