This is the episode where Ross' ex-wife Carol and Susan want to get married and Joey is first in Days of Our Lives. In the opening scene, Ross is giving Ben, his and Carol's baby, to Carol and Susan. When he takes the sheet off of Ben, his hair is blond. Then, when he gives the baby to Carol, the baby's hair is brown. Then the camera shifts to Ross, and when it goes back, the baby's hair is blond again. I don't know how this could have happened but I am 100% sure it was a slip-up.