The second part of the credits, in which, after wild animals and fights as were expected, you can see Tarzan's family, and particularly Jane and Kala looking moved.
The freeing of the Leopard men from La's slavery/control in "The Leopard Men Rebellion" was surprisingly heartwarming when one gets over the initial shock of the episodes twist ending.
From "The Mysterious Visitor", after Edgar Rice Burroughs himself has been hearing about all of Tarzan's amazing exploits, Jane comes to say that all those stunts are only one part of the man. In truth, he's a much kinder and gentler person that his power would have him appear. Coupled with flashbacks of their romance.
All this gave Ed the inspiration he's been searching for.
"Tarzan and the Lost Cub" ends with the aforementioned leopard cub returned to his mother, both pay Tarzan and Jane a friendly visit later.
Before that, when the cub reunites with it's mother. It walks into a cave and sees her sitting curled up in the back looking sullen. Then she sees her cub, and smiles.
In "British Invasion", Jane's friends from England come to the jungle to rescue her when they mistakenly believe she's been held hostage.
In "The Face From the Past", Tarzan confesses a secret he'd been keeping from Kala for twenty years - namely, that he started a fire that almost wiped out all the jungle - and that the mandrill Zutho had been using to Blackmail him. Although disappointed that he never told her from the start, Kala completely forgives Tarzan for the event, simply happy that he finally got the secret off his chest. It really shows how much she loves and cares for Tarzan, even when he thought he couldn't be forgiven for such a disaster.
Then, in a moment that also counts as Kala's biggest Moment of Awesome, she goes full Mama Bear on Zutho when he has the nerve to pipe up. When she demands to know if his own mother knows of his behaviour, the only thing he can squeak out is: