Lassie

Lassie was an Emmy Award-winning American television series that follows the adventures of a female rough collie named Lassie and her companions, human and animal. One of the longest running dramatic series on television, Lassie was first broadcast from September 12, 1954, to March 24, 1973.

The show saw seventeen seasons on CBS before entering first run syndication for its final two seasons. Filmed initially in black-and-white, the show transitioned to color during the 1960's.

The show's first ten seasons follow Lassie's adventures in a small farming community with two boys, Jeff Miller (1954-1957) and Timmy Martin (1957-1964). When her exploits on the farm end in the eleventh season, Lassie finds new adventures in the wilderness with Forest Rangers Corey Stuart, Bob Erickson, and Scott Turner.

Following a year without human leads (1970), Lassie finally settles at a children's home for her final seasons.
From: Wikipedia.org

Lassie — 1954-1957 opening credits

Lassie — 1954-1957 end credits

Lassie — 1957-1964 opening credits

Lassie — 1957-1964 end credits

Lassie — 1967 color opening

Linked from nostalgia and retrospection posts:

• CLASSIC TV — K to L
• 1956 TV Guide Covers
• 1957 TV Guide Covers
• 1963 TV Guide Covers