
There's a recurring theme in comedy. A tradition that goes back hundreds of years. It's the role of the "idiot". Some modern comedies seem to have seized on the idea that the idiot is where all the funny stuff comes from, and therefor movies will be funnier if ALL of the characters are idiots. The higher quality comedies (like The Hangover) realize that the idiot is only funny as a contrast to the normal people. Land of the Lost doesn't commit to either philosophy. The creators of this film think the best humor is when most people act like idiots most of the time, but occasionally rise to the level of normal brain function, regardless of the character. Will Farrell portrays Dr. Rick Marshall, a genius scientist and inventor, and is naturally the primary idiot. He's an idiot all of the time, and his flashes of brilliance come out of nowhere with no plausibility. Anna Friel is Holly Cantrell, the naive and optimistic young grad student, and she is the fool who follows the idiot. She is mostly normal, but comes off like an idiot when she treats Marshall like he's normal. And lastly, the character who should be the only idiot of the bunch, Danny McBride plays Will Stanton, a guy who runs a desert tourist trap and gets sucked into their wacky adventure. Will is the only consistent character in the group (mostly idiot with some street smarts).
You may have noticed that the three leads are not related like in the original TV series. That's because it would be inappropriate for Will Farrell to make out with Anna Friel if they were supposed to be father and daughter.
The saddest part is that you can almost see the movie that could have been. If Farrell had been cast as the idiot who gets pulled along for the ride and the two scientists had been portrayed as almost normal, it could have been good. Cut out the scenes that are nothing more than Farrell pouring dinosaur urine on himself, and add in a plot twist or two to throw us off the movie's big glaring obvious plot twist, and it could have been something.
The exchange that sums up the movie: Will: "You ever tired of being wrong?" Marshall: "I do! I really do!"
It's only funny because it's true.