#3 - Futurama - "The Lesser of Two Evils" - April 24 - 2.3/4 (1905)
#12 - Futurama - "Why Must I Be A Crustacean In Love?" - April 23 - 2.1/4 (1764)
#15 - Futurama - "I Second That Emotion" - April 17 - 2.1/4 (1764)
#25 - Futurama - "A Head in the Polls" April 21 - 2.0/4 (1649)
#27 - Futurama - "Fry and the Slurm Factory" - April 16 - 2.0/4 (1609)
#31 - Futurama - "Hell is Other Robots" - April 10 - 2.0/4 (1653)
#33 - Futurama - "A Big Piece of Garbage" - April 9 - 2.0/4 (1612)
#39 - Futurama - "Put Your Head on my Shoulder" - April 27 - 1.9/4 (1536)
#44 - Futurama - "Xmas Story" - April 22 - 1.9/4 (1585)
#46 - Futurama - "Brannigan Begin Again" - April 20 - 1.9/4 (1551)
#54 - Futurama - "A Flight to Remember" - April 13 - 1.9/4 (1550)
#98 - Futurama - "Fear of a Bot Planet" - April 6 - 1.8/3 (1455)
Anything under 1.8 wasn't charted. Overall it was a high scoring month for CN.
Download the whole ratings chart here -
http://www.itty-bitties.com/toon_april_top_100.xls