Cosby Show - when the kids grew up and started having kids of their own. (You ain\'t nuthin\' but a Rudy Huckleberry
)
X-Files - when EVERY freakin\' episode was about aliens. I know there\'s a good one every now and then, but still. I honestly couldn\'t give a hoot about Mulder\'s sister.
Star Trek: DS9 - when EVERY freakin\' episode was about the DOMINION.
Star Trek: Voyager - I wanted Seven to be a lesbian, dammit.
and kirath...Dr. Crusher came back soon only a season or so later, but I agree with you.