Where can I watch The Carol Burnett Show in United States?

The Carol Burnett Show is an American variety/sketch comedy television show starring Carol Burnett, Harvey Korman, Vicki Lawrence, Lyle Waggoner, and Tim Conway. It originally ran on CBS from September 11, 1967, to March 29, 1978, for 278 episodes and originated from CBS Television City's Studio 33. The series won 25 prime time Emmy Awards, was ranked No. 16 on TV Guide's 50 Greatest TV Shows of All Time in 2002 and in 2007 was listed as one of Time magazine's "100 Best TV Shows of All Time."