Which Seinfeld Episode is the One Where Elaine Dates a Homeless Guy?

I've been looking for this episode and for the life of me I can't find
it. (Could I be misremembering other episodes and combining them?)

I seem to recall a Seinfeld episode involving Elaine dating this guy
who she becomes enthralled with, thinking he's near-perfect - until
someone (if not her, then possibly Kramer or Jerry) discovering his
"apartment" which was some abandoned room or building or something.
Forgive my stupidity if the answer is obvious, but which episode is
this, and from which season? Thanks so much.