From Spider-Man & His Amazing Friends:
One of Spider-Man's oldest foes, the Chameleon, surfaces to create confusion and chaos, laying a trap for the Spider-Friends and special guests Shanna, Dr. Strange, Captain America, & the Sub-Mariner in a loose adaptation of Agatha Christie's Ten Little Indians. Here's "Seven Little Superheroes":
Ya know, pilgrims, I have 0 memory of seeing this episode, so there ain't a rating to be had.