Here are the winning answers:

Ok Dennis Quaid is in Traffic with Michael Douglas who is in The Ghost And The Darkness with Tom Wilkinson, who is in the Full Monty

Dennis Quaid starred in "Caveman" in which Avery Schreiber appeared. Avery Schreiber starred in "Silent Scream" in which Robert Carlyle appeared in, and Robert Carlyle starred in "The Full Monty".

Jaws 3 with Dennis Quaid reminded me of the "lancelot and the Marsh Castle" scene in "Monty Python and the Holy Grail" (Not quite what we were looking for, but entertaining so we'll count it!)

Dennis Quaid exposed his "frontal nudity" in the Big Easy, just like they do in the full Monty!!!! (Even more entertaining so we'll count this one too!)

The full Monty featured Robert Carlyle, who acted in Eragon alongside John Malkovich, who appeared with Matt Damon in Rounders. Matt Damon was in Good Will Hunting with Robin Williams, who acted with Robert Sean Leonard in the Dead Poet's Society (which Wal Mart does not have, dam them!), the same Robert Sean Leonard who acts with Hugh Laurie on House. Hugh Laurie acted in Flight of the Phoenix with Dennis Quaid!