I was courting my now (and always) wife when this show came on in 1970. We used to sit in her folks non-air conditioned apartment and roll in laughter.
This was our first exposure to Robert Klein, after which we became big fans.
I remember one sketch where a Doctor is at an anatomy chart, using a pointer to review for his audience the steps for a very serious procedure.
(I'm paraphrasing) "After appropriate anesthetic, we will proceed to make the incision, pull back the skin in question, and commence with the procedure. . . " He goes on with this, detailing a very complex surgery filled with drama and risk.
Then, when he is finished and takes a breath, he turns to the audience and states, "UnLESS the patient is a Capricorn." . . .
I wish I had that clip from 40 years ago.
Great show for its time.
Artie