Episode 1: "The Leopard's Mark" "Peg o' the Rine" opens with a prologue depicting the arrival of a circus in a small town, the detraining, selection of the location, erection of the tent and the preparation of all of the paraphernalia for the exhibition of the show. As the hour of the performance approaches, we are introduced to Peg, known as Peg o' the Ring, an aerial performer; Flip, her guardian and supposed father; Pierre Durand, an athlete, her lover; Big Bill Barnen, who runs the show; and Polo, an athlete and tumbler, preparing for their work in the ring. As Peg and Durand go to their dressing rooms Big Bill Banen meets Flip and tells him that he would like to see him before the day is out. In his office in one of the circus wagons Barnen tells Polo, his henchman, that for certain reason he would like to have Flip out of the way. Polo is agreeable. When Flip comes in Barnen sends everyone else out of the office and brings the conversation around to Peg. He is the only one in the circus who suspects that she is not Flip's daughter. After telling Flip that he is getting too old for the circus stunts, he suggests that he might keep him if he will tell him who Peg really is. Flip refuses and comes very near being throttled by Barnen. Flip leaves the wagon after telling the manager that he holds his whole future in the palm of his hand. Barnen resolves to get Flip out of the way, and tells Polo to pull a horse whip when Flip is in the ring that night doing his big jump, Polo obeys his orders implicitly, and Flip is fatally injured in his jump. Realizing that his hours are numbered he calls Pierre to him and starts to tell him who Peg really is. All unknown to them Big Bill Barnen is listening to them. "Years ago," says Flip, "we were in winter quarters. La Belle, the wild animal queen, had been feeling depressed for some time. I was nothing to her but a friend, but she was all the world to me. I was the only one in the circus who knew that she was secretly married to Dr. Lund, owner, but for reasons of his own the doctor had decided that the marriage must be kept a secret. It was this fact which made La Belle so downhearted. I tried in every way to cheer her up, but I knew in my heart that there was another woman in the doctor's life. I loved her too well to tell her, but I never had the courage to tell her of my love. I had watched over her like a child, and I cautioned her frequently against taking such chances in the cage with her wild animals. And that very night, it was the opening performance of the season, the big cats jumped on her, and before the trainers could get into the cage she had been dangerously hurt. How dangerously, none of us knew at the time. They took her into my tent, and she lay in my arms weeping. The first episode ends at this point with the question, "Who is Peg?"