: Sheldon names it "Fish" to avoid emotional attachment.
: While not the main focus, a squirrel stuck in the chimney adds to the household's animal-related chaos. The Tragedy of "Fish" the Fish [S1E20] A Dog, A Squirrel, and A Fish Named Fish
: Zoe Perry, who plays Mary Cooper, is the real-life daughter of Laurie Metcalf, who played Mary in The Big Bang Theory . : Sheldon names it "Fish" to avoid emotional attachment
: Herschel Sparks begins caring for his brother's dog, Bucky. The dog shows a mysterious and persistent attraction to Sheldon, often escaping into the Coopers' garage to be near him. who plays Mary Cooper