Program Lineup: Don Adams does an opening monologue about income tax season, The Half Brothers do a comedy juggling act, Barrie Chase performs a very sexy dance number to 'Son of a Preacher Man,' Ruth Buzzi and Alan Sues appear in a sketch about visitors day at prison, The Letterman sing 'Put Your Head on My Shoulder' and 'Light My Fire,' Don does another stand-up spoofing British army films of the thirties, Tony Martin sings 'Learn How to Laugh' and 'Lonely Is a Man Without Love,' and Don and Joey Foreman do a sketch about actors who hang out at Schwab's Drugstore in Hollywood.