KNOTTS HOWARD GRIFFITH

ADV. FOR FRI. AMS, JUNE 4--FILE--Cast members from "The Andy Griffith Show" pose in this undated photo. From left: Don Knotts as Deputy Barney Fife, Ron Howard as Opie Taylor and Andy Griffith as Sheriff Andy Taylor. Episodes of the show are used in "Finding the Way Back to Mayberry," a Bible study class developed by two Alabama men who believe watching "The Andy Griffith Show" can help lead to spiritual enlightenment. (AP Photo/Viacom, file)

ANDY GRIFFITH AND DON KNOTTS

Andy Griffith and Don Knotts posing in a 1986 photo. (AP Photo)

Jim Nabors, George Lindsay, Don Knotts, Andy Griffith, Ron Howard

Jim Nabors (top left) in character on Jan. 9, 1987, George Lindsey (top right), five-time Emmy winner Don Knotts (bottom left), Andy Griffith (bottom center) and Ron Howard reprise their roles from the popular series ?The Andy Griffith Show? in ?Return to Mayberry,? a comedy film that finds Andy Taylor (Griffith) returning to Mayberry to run again for sheriff, only to discover his former deputy Barney Fife (Knotts) has also entered the race. . (AP Photo)

Andy Griffith. Dick Van Dyke

Actor Andy Griffith and Dick Van Dyke pose on the set of the series ?Matlock? in which Griffith stars in March 1986. (AP Photo)

GRIFFITH

Andy Griffith sits in front of a bronze statue of Andy and Opie from the "Andy Griffith Show," Tuesday, Oct. 28, 2003, after the statue was unveiled during a ceremony in Raleigh, N.C. Griffith's 40-year acting career has been largely defined by Sheriff Andy Tayor, who he played in the show. (AP Photo/Bob Jordan)

Andy Griffith Onionhead

Andy Griffith, star of the New York stage play "No Time for Sergeants," ponders the problems of a cameraman at Warner Brother's studio in Burbank, Nov. 8, 1957 where he is working in "Onionhead." The movie is a story of a recruit in the U.S. Coast Guard, played by Griffith, who loses all his hair and is dubbed "Onionhead" by his crew mates. (AP Photo/David F. Smith)

Freedom Awards Ceremony - November 9, 2005

UNITED STATES - NOVEMBER 09: Andy Samuel Griffith and President George W. Bush at the Freedom Awards Ceremony at the White House in Washington D.C. on November 9, 2005. (Photo by Douglas A. Sonders/Getty Images)

2nd Annual TV Land Awards - Pressroom

HOLLYWOOD, CA - MARCH 7: Actor Andy Griffith poses backstage at the 2nd Annual TV Land Awards held on March 7, 2004 at The Hollywood Palladium, in Hollywood, California. (Photo by Frederick M. Brown/Getty Images)

2nd Annual TV Land Awards - Show

HOLLYWOOD, CA - MARCH 7: Actors Billy Bob Thornton (L) and Andy Griffith on stage at the 2nd Annual TV Land Awards held at The Hollywood Palladium, March 7, 2004 in Hollywood, California. (Photo by Frank Micelotta/Getty Images)

2nd Annual TV Land Awards - Show

HOLLYWOOD, CA - MARCH 7: Actors Andy Griffith (left) and Don Knotts speak on stage at the 2nd Annual TV Land Awards held on March 7, 2004 at The Hollywood Palladium, in Hollywood, California. (Photo by Kevin Winter/Getty Images)