When you’re reviewing a Will Ferrell comedy that involves a dinosaur’s giant turd, you know the capsule’s pretty much going to write itself. In this gigantic chunk of scat from Universal Pictures and director Brad Silberling, Ferrell plays a scorned scientist who hopes to revive his reputation with a time-travel machine; accompanied by cheeky Anna Friel and mangy Danny McBride, he journeys to an alternate reality populated by dinosaurs, apelike creatures with severe dental problems, and a master race of trudging, goggle-eyed lizard men. The 70s TV series Land of the Lost was the last hit for Saturday-morning moguls Sid and Marty Krofft, who were still around to produce this feature and are now threatening to revive H.R. Pufnstuff and Sigmund and the Sea Monsters for the big screen. They must be stopped. PG-13, 101 min.