He joined The Electric Company with Denise Nickerson ( who was in only season two ) .
They replaced Irene Cara ( who was in only season one and recently departed in 1972 ) in season two , playing , most notably , Doctor Doolots .
He joined The Electric Company with Denise Nickerson ( who was in only season two ) , and they replaced Irene Cara ( who was in only season one and recently departed in 1972 ) in season two , playing , most notably , Doctor Doolots .