Nah, they don’t get the benefit of the doubt anymore. “I smelled weed” has been used for decades to skirt probable cause requirements. Because it’s transient evidence that can’t be saved or replicated, and you can’t prove that they’re lying. You can be 100% clean, but a cop claims he smelled weed and now your car’s interior paneling is getting ripped out on the side of the highway.
The cop lied to get the search approved. No more, no less.
Most of the episodes aired before at-home VHS was common, and TV stations weren’t in the habit of archiving their old footage for nightly broadcasts; The show was viewed as transient since it dealt with current events, and nobody expected people to want to re-watch old episodes. It’s likely that a lot of them aren’t available simply because nobody (including the tv station) has recordings.