3x17 Calling Doctor Huxtable
First Aired: Feb. 12, 1987 on NBC
Summary: Cliff winds up with three women who are due to deliver at about the same time when he fills in for another doctor. Meanwhile, Vanessa is surprised when Cliff understands when her friend ignores her request and smokes a cigarette in her room anyway.
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Dr. Heathcliff 'Cliff' Huxtable: Mrs. Schrader has been here eight times. I know the Schrader babies. When they see daylight they run.
Rudy: [about smoking] It makes your breath stink. It makes your lungs dirty. And then you die!