Actor Hal Holbrook is 91. He has been playing Mark Twain on stage since 1948 and takes his famed rendition of the great American author and humorist to Bloomington's BCPA Tuesday night. Holbrook has said in the past he never does the show the same way. But in this conversation with GLT's Charlie Schlenker Holbrook admits after 66 years he might have come close once or twice.