Description:  Lassie's Rescue Rangers is an animated series from the 1970s where Lassie leads a team of animal friends and the human Turner family ranger team to protect Thunder Mountain National Park. The show features weekly episodes with cliffhanger disasters, ecological threats, and rescue missions that the team must overcome using their combined skills. The animal rescue team includes characters like Groucho the owl and Old Toothless the mountain lion, while the human team consists of Ben Turner, his wife Laura, and their children Jackie, Susan, and the blind Ben Jr..

Premise: Lassie, a collie, and a team of animal "Rescue Rangers" work with the Turner family to protect Thunder Mountain National Park and its visitors.

Human characters: The Turner family includes Ben Turner, his wife Laura, and their children Jackie, Susan, and Ben Jr., who is blind. They are assisted by a Native American friend named Gene Fox.

Animal characters: Lassie is the leader of a group of animal characters, including Groucho the owl, Musty the skunk, Robbie the raccoon, and Old Toothless the mountain lion. The animal characters express themselves through action, as they do not speak.

Episodes: Each episode typically involves a new disaster or threat that the team must overcome.

Settings: The series is primarily set in Thunder Mountain National Park but occasionally travels to other locations for specific missions.