Watch our exclusive interview with Bob Newhart: high bandwidth or low bandwidth

The first season (of six, on CBS until August 1978) offered the same high quality as The Mary Tyler Moore Show (also produced by Moore's MTM Enterprises) and established many of the memorable characters who contributed to the show's enduring greatness. Bill Daily (late of I Dream of Jeannie) would thrive as the Hartley's divorced neighbor Howard (his uninvited "Hi Bob!" intrusions inspired that infamous drinking game), while married neighbor Margaret (Patricia Smith) would disappear by season's end. Among Bob's hilarious group-therapy patients, the miserable misanthrope Mr. Carlin (Jack Riley) was a comedic goldmine as the series progressed, but it's Newhart's own comic genius--including his perfected phone-call routines and deadpan reactions to everyday dilemmas--that remained the show's greatest asset. These 24 first-season episodes are remarkably consistent under the direction (mostly) of sitcom veterans Jay Sandrich and Alan Rafkin, and guest stars include Penny Marshall, Louise Lasser, Allen Garfield, Chuck McCann, and a host of other '70s TV stalwarts, all meshing nicely with one of TV's funniest ensemble casts. --Jeff Shannon