Corduroy

[In the final episode of the TV series, what Lisa's Mom states to Lisa, it refers to the first episode from way back in the start of the said series; "Lost and Found". After all, this episode "Finders Keepers / Between the Covers" is the final episode of the series.]

Lisa's Mom:
[to Lisa] Do you remember the time when you lost Corduroy?

Lisa:
Yes. The subway conductor found Cordy and took him to the lost and found.

Lisa's Mom:
How would you have felt if that conductor decided to keep Corduroy for himself?

Lisa:
I guess you are right, Mom.

Lisa's Mom:
[about J.R] Let's check J.R's collar again. Sometimes an owner might put some identification on the other side of a pet's tag. [checks the other side of J.R's tag] Here we go. A phone number.

[Although Lisa had not known who J.R the dog belonged to, Lisa's Mom checks the other side of J.R's collar. The other side of the collar shows his correct owner's name and the phone number to call if he gets lost. Lisa's Mom goes over to the telephone to call the phone number]