Timmy buys an old plowhorse for a dollar, but Paul says they cannot keep the animal since he can't do any work. In trying earn money to keep the horse, Timmy becomes trapped in a mine.

A down-on-his-luck horse racer who needs to win just one more race to start his own farm boards his two harness horses, Big Boy, his future stud horse, and Lazy Joe, Big Boy's stablemate, at the Martin farm. But at an early time-trial, Big Boy turns up lame.

Due to stock killings by a puma nicknamed ""Satan,"" the local farmers hire a bounty hunter, a curt, unlikable man whose tracking dog King and Lassie immediately strike sparks off one another.

Timmy persuades editor Ira Caldwell to let him try and earn money by selling newspaper subscriptions to the Calverton Sentinel,and then accidently overhears a plan to rob the local dairy's co-op while at the Vance farm.

Phil Houston's stockyards suddenly gets a new source of lambs for market thanks to his assistant Joe Morton and Lassie seems to be reacting to strange noises not coming from the new silent dog whistle Timmy recently purchased.

large mongrel dog who's been a nuisance on neighbors' farms is trapped in a gorge, and although most of the farmers want the stray dead, the Calverton dog pound representative wants to save him.