Finders Key-pers is the second part of the nineteenth episode of Arthur season 2. Finders Key-pers aired on May 18, 1998. It aired with the episode "D.W.'s Name Game".
Arthur, Binky, and the Brain find a key in the grass while looking for a baseball. They each think it is for something they would like and argue over who gets to keep the key before they find out what it's really used for.