Exclusive: Sing Along With Will Ferrell In New 'Land Of The Lost' Clip

"Marshall, Will, and Holly/ On a routine expedition..." It's one of the most famous theme songs in television history and if you were wondering whether it'd find its way into the big-budget "Land of the Lost" movie, the answer is a big yes.

In our exclusive "Land of the Lost" clip from tonight's episode of "Spoilers," Rick Marshall (Will Ferrell) entertains his companions with the beginnings of a new song he's working on...one that you might recognize. His sing-along is interrupted by...well you'll just have to watch. Check it out and then click here to see all our "Spoilers" exclusives, including "Transformers: Revenge of the Fallen," "Watchmen" and more.