In the first scene with multiple cats, Sheldon says that Richard Feynman is the name of a white cat (on the back of the couch). In the scene in Sheldon's bedroom with his mother and Leonard, Sheldon points to an orange cat as being Feynman.
Please read the following before uploading
Do not upload anything which you do not own or are fully licensed to upload. The images should not contain any sexually explicit content, race hatred material or other offensive symbols or images. Remember: Abuse of the TV.com image system may result in you being banned from uploading images or from the entire site – so, play nice and respect the rules!