At the beginning of the film, Roger is seen working on a song. Pongo, having grown bored with their bachelor lives, conspires to set his pet up with a girl. After seeing Anita and Perdita, Pongo decides they would be perfect, as they were both beautiful. Pongo sets the clock ahead, so that Roger believes that it is time for their walk. Roger is then forcefully dragged along as Pongo attempts to get Roger and Anita to meet. Eventually, Roger and Anita end up in the pond of the park, entangled by the leashes of their dogs. Roger attempts to apologize to the upset Anita, and the two end up laughing. A time skip shows that Roger and Anita fall in love and marry, and the two settle in a small house near the park with Pongo, Perdita, and Nanny.

Weeks after the pups have been born Roger & Anita takes Pongo & Perdita out for a walk. While they are gone, the puppies are stolen by Jasper and Horace, hired hands working for Cruella. Roger is shown to be saddened. He suspects Cruella's involvement, but neither he nor the the police are able to connect her to the crime.

Roger is seen near the end of the film, around Christmas time, wondering why Pongo and Perdita had run away (Unknown to him, they had gone to rescue the puppies). After hearing his Cruella song on the radio, he turns it off. It is revealed by Anita that the song had become Roger's first big hit, and had brought in more money than they could dream of. When a group of "Labradors" come bursting into the home, Roger is confused, but he quickly realizes that they are actually Pongo, Perdita and the puppies. Roger soon realizes that there are more than 15 puppies, and as Anita and Nanny find puppies, he adds up the totals to reveal that there are 101 dalmatians all together. Together with Anita, he decides to use the royalties from his song writing to buy a country home big enough to keep all the puppies.