"Greenzo" brought in an average of 6.6 million viewers, the highest number of viewers since the second season premiere, "SeinfeldVision". The episode also achieved a 3.1/8 in the key 18- to 49-year-old demographic, matching the series' highest rating in that demographic. The 3.1 refers to 3.1% of all 18- to 49-year-olds in the U.S. and the 8 refers to 8% of all 18- to 49-year-olds watching television at the time of the broadcast, in the U.S. This episode also ranked in first place in the men 18–34 demographic, against programs airing on other networks in the same timeslot.
