"Lassie" would remain on CBS's programming until 1971. In 1964 the series changed its format as Lassie went to work with United States Forest Service workers. The TV Lassie was originally played by Pal who had been the MGM Lassie -- the other five dogs that would play the role were all descendents of Pal.
"Petticoat Junction" had its most success in its initial season. Some say part of the reason for decline was that Billy, Bobbie and Betty kept changing -- in three seasons they were played by five different actresses. "Dog" was played by Higgins the Dog in all three seasons.
"My Favorite Martian" debuted on CBS on September 29, 1963 and would run for three seasons. Ray Ralston starred as Uncle Martin (the Martian).
They weren't sisters -- they were cousins on The Patty Duke Show.
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For many of the juniors of the Class of ’65, television would become less a part of our lives.  As sophomores we might have been a little more home bound and a little less involved in extracurricular activities.  But as juniors, more of us were involved in varsity sports, musical productions, clubs, drama, etc.; activities that meant less time at home.  And of course there was always time set aside for cruising the streets of Lincoln.  But when we did watch television, there were some notable new shows.  While 14 of the top twenty were repeats from 1962, the 1963 season brought back a couple of “oldies” into the top twenty.  CBS’s “Lassie” had been with us since 1954.  The 1963 version of the show still had Lassie living on a farm with Timmy (Jon Provost) and his adoptive parents, Ruth (June Lockart) and Paul (Hugh Reilly) Martin.  “The Donna Reed Show” had been on ABC since 1958 and the 1963 season would be its best in terms of ratings – ironic since this was the first season without Shelly Fabares (Mary) as a regular.  Three new shows cracked the top twenty:  “Petticoat Junction,” “My Favorite Martian,” and “The Patty Duke Show.”  “Petticoat Junction” was the highest ranked of the season debuts.  It was the first time we got to see Billy Jo, Bobbie Jo and Betty Jo peek out from behind that water tower and welcome us to Hooterville and the Shady Rest Hotel.  The series would continue on CBS through the 1970 season.  Bill Bixby and Ray Walston starred in “My Favorite Martian” – it would last three seasons, the first being the only in the top twenty.  “The Patty Duke Show” would also only have a three season run with Ms. Duke playing “twin” cousins Patty and Cathy Lane.  Another significant newcomer was “The Fugitive” which would air for four seasons, the concluding episode of which would be one of the most watched television shows of all time.  In 1963 we were first introduced to the plight of Richard Kimble (David Janssen) as he was “falsely accused” of murdering his wife, escapes, and is pursued across the nation by Inspector Gerard (Barry Morse).  Of course, the biggest television event of the year was the coverage of the assassination of President Kennedy.  From the initial announcement of the events in Dallas, through the shooting of Oswald and the funeral procession, the networks pre-empted regular programming.  Perhaps the biggest innovation of the year in television was the development of “instant replay.”  It was first used in the Army / Navy game on December 7th (a game delayed a week due to the assassination).  It did not go very well, with the only successful shot coming when Army quarterback Rollie Stichweh ran in a one yard touchdown.  CBS showed the replay and viewers were instantly confused – had Army actually scored twice?  Lindsey Nelson had to assure viewers, “Ladies and gentlemen, Army did not score again.”  Navy won 21 – 15. It was obvious that instant replay had potential, and it would endure. But of everything that we experienced through television in '64-'65, one thing endured the most; "yeah, yeah, yeah!"
Top Ranked Shows of '63-'64
The Beverly Hillbillies
The Dick Van Dyke Show
Petticoat Junction
The Andy Griffith Show
The Lucy Show
Candid Camera
The Ed Sullivan Show
The Danny Thomas Show
My Favorite Martian
The Red Skelton Show
I've Got a Secret
The Jack Benny Show
The Jackie Gleason Show
The Donna Reed Show
The Virginian
The Patty Duke Show
Dr. Kildare
Shelley Fabares left the "Donna Reed" show in 1963. She would go on to star with Elvis in "Girl Happy" in 1965 and later in the 1990's on "Coach."

A tape machine like this was first used for instant replay in 1963. CBS Sports director Tony Verna is credited for being the first authorized use of the technology.