Rewatching old CSI: Vegas. My wife bought the DVDs on eBay.
On the one hand, WOW it's old enough to look bad scaled up to a large 4K TV (with vertical letterboxing)
On the other hand, it was definitely a good show because we still remember bits of even the first episodes after all this time! And the show stands up well under the poor video quality.
Not sure I'd say that about lots of more modern shows…