The count of people to stand up against the icon climbs to 40.
During a routine at the University of Pittsburgh, the SNL actor threw some jabs at the TV icon.
Comedian says he's "far from finished" in promo clip.
Three women argue that Cosby publicly branded them as liars.
Actor says, "women are vulnerable in this society."
The comedian wouldn't impersonate the TV dad during the show's Sunday special.