The title "Escape From The Salt Mines" has to do with Fred Rutherford always calling the workplace "the salt mines" in the original LITB show.
Beaver takes the blame for a mistake Lumpy Rutherford made at work that costs the firm a large account. When Beaver is fired by Fred Rutherford because of this mistake that he didn't actually make, Lumpy says nothing.
So Beaver fakes going to work for a couple of days because he can't face telling his family what happened. He decides to talk to Gus over at the fire house and discovers that he probably took the blame for the mistake because deep down he wanted to get fired because he wasn't happy working for Fred Rutherford. This gives him an improved outlook on the situation. But meanwhile he is having trouble finding another job and Lumpy is having trouble looking his daughter in the eye when confronted with what he did. Complications ensue.
It's odd seeing Lumpy feel guilt over anything that he would do to Beaver given how badly he treated him when they were kids, being downright menacing towards him in the first couple of seasons of LITB. It's ironic that Beaver was the one to point out to Lumpy that his conscience would get him in the end when he let Wally take the blame for a towel fight in the locker room in the original LITB.
This week it is Eddie who breaks the news of Beaver's unemployment to the Cleavers when he brings over a box of dented canned goods. Of course, he wants a receipt for tax purposes.
Burt Mustin, who played fireman Gus in the original LITB, would have been 101 if he was still playing this part, and he passed away in 1977. Carmen Filpi, who played Gus in the revived series, would have been young enough to be Burt Mustin's grandson.
I think I prefer the episodes of the revived series such as these where the adults are centerstage and the kids are supporting characters versus the opposite situation. It just seems that the kids in the series are less genuine than the adults, who I remember so well from the original series when they were children.