Synopsis
The series centers on the McCulloughs, a middle-class family living in suburban Glen Ridge, California. The McCulloughs are the owners of the then-present-day descendent of Lassie. Real life spouses Christopher and Dee Wallace-Stone played Chris and Dee McCullough, with Will Estes (credited by his given name of Will Nipper) and Wendy Cox appearing their young son Will and teenage daughter Megan respectively.
Jon Provost, who starred in the original Lassie series, portrayed Chris' brother Steve McCullough who was revealed in a later episode to be the adult Timmy Martin in an episode guest-starring June Lockhart in a reprisal of her role as Timmy's foster mother Ruth Martin. In the episode titled "Roots", Timmy reveals that he was never officially adopted by the Martins, and thus couldn't go with them to Australia when they moved there (at the beginning of season 11 of the original Lassie series). Subsequently, he was later adopted by the McCullough family, and began going by his middle name of Steven (Steve).
Read more about this topic: The New Lassie