Indiana Jones and the Kingdom of the Crystal Skull fits well into the film series, picking up 20 years after the previous entry.
The plot still involves the supernatural (or otherworldly, if you prefer). It's the funniest film of the series and changes up the formula a bit. The action sequences are still there but Indy gets more help this time around than every before.
Like the other Indy films before it, Crystal Skull is fun and will keep you entertained. There are a couple of twists that you may not see coming, but they work well and involve the extraordinary. The film does a good job of welcoming an old friend back.