Knives go dull much faster in the dishwasher. If you want to keep your knives sharp, you should be hand washing as soon as you’re done with them.
Also, get a damned knife block; Having your knives rattling around in a drawer is just asking for dull knives and accidents.
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.