▁the ▁highest ▁ratings ▁in ▁Ad ult ▁Sw im ' s ▁history . ▁Rick ▁and ▁Mort y ▁was ▁the ▁most ▁popular ▁television ▁comedy ▁within ▁the ▁ 1 8 – 2 4 ▁and ▁ 1 8 – 3 4 ▁age ▁ranges ▁in ▁the ▁United ▁States , ▁based ▁on ▁" Live + 7 " ▁ratings ▁data ▁sp anning ▁from ▁December ▁ 2 0 1 6 ▁to ▁September ▁ 2 0 1 7 . ▁This ▁rating ▁system ▁tracks ▁live ▁view ership ▁plus ▁streaming ▁and ▁on - dem and ▁view ing ▁over ▁an ▁initial ▁week - long ▁period , ▁and ▁provides ▁a ▁more ▁accurate ▁picture ▁of ▁delayed ▁view ing ▁as ▁compared ▁to ▁" Live + S ame ▁Day " ▁ratings . ▁Consider ing ▁that ▁episodes ▁of ▁the ▁third ▁season ▁originally ▁a ired ▁at ▁ 1 1 : 3 0   p . m . ▁on ▁Sund ays , ▁it ▁is ▁very ▁likely ▁that ▁people ▁would ▁have ▁watched ▁them ▁on - dem and ▁the ▁next ▁day ▁or ▁several ▁days ▁later . ▁ ▁Christ ina ▁Miller , ▁the ▁president ▁of ▁Ad ult ▁Sw im , ▁told ▁Fort une ▁that ▁Rick ▁and ▁Mort y ▁" go es ▁beyond ▁just ▁appe aling ▁to ▁mill enn ial s ," ▁as ▁numbers ▁suggest ▁that ▁people ▁of ▁all ▁ages ▁are ▁watching ▁the ▁show . ▁The ▁second ▁episode ▁of ▁the ▁season , ▁which ▁a ired ▁nearly ▁four ▁months ▁after ▁the ▁un ann ounced ▁premi ere , ▁was ▁the ▁season ' s ▁most - watch ed ▁episode ▁with ▁ 2 . 8 6 ▁million ▁view ers ,