Most actors are "specialists."  Casting a drama?  Harrison Ford, Tom Cruise and Denzel Washington can really deliver.  Got a hot comedy?  Check your rolodex under Jim Carrey, Will Smith or Eddie Murphy.  Then there's Robin Williams.  An Oscar-winning superstar who can make you laugh in one movie -- and make you cry the next.  Now Robin does both in his latest pic, 'Jakob the Liar.'

If laughter is the best medicine, then Robin Williams has been earning his medical degree for years in such rib-tickling movies as 'Good Morning, Vietnam' and 'Mrs. Doubtfire.' 

For his second dramatic role since earning an Oscar for 'Good Will Hunting' (his first was What Dreams May Come), the versatile comedian and actor stepped into the shoes of a real-life medicine man 'Patch Adams.'

Will the "reel" Robin Williams please stand up?  Is he the manic funnyman behind everyone from TV's Mork to 'Aladdin's' Genie?  Or is he the serious thespian who won an Oscar for 'Good Will Hunting' and critical acclaim for dramatic roles in 'Dead Poets Society,' 'Awakenings' and 'Moscow on the Hudson'?

Actually, Williams is in the enviable position of being utterly believable, no matter what kind of

part he plays. Throughout his show business career, he's been able to take audiences along for the ride, whether it's on a wacky comedy "riff" or into the heart of a moving scene that could bring even the toughest filmgoer to tears.