What do these episodes all have in common?

Beaver, The Model

Eddie Spends the Night

Wally's Car - When Wally buys a $25 1936 Coupe jalopy

The Dramatic Club - Beaver plays the lead, a little Dutch boy

Neither Ward nor June see how the boys resolve the problem?

Good answer but not what I was thinking...

Hint: In all these episodes someone is mentioned who we don't see.

Sal Mineo or somebody like that?

Good answer but not what I was thinking...

Hint: In all these episodes someone is mentioned who we don't see.
Tony Curtis?

It was Sal Mineo mentioned in those episodes and Tony Curtis was mentioned umpteen times too.