S01E15: Curious George And The Invisible Sound

The Man with the Yellow Hat is studying insect behavior in the country. George eventually tires of watching and decides to go to bed, but a strange and annoying sound in the house keeps him awake. He tries to track down what the sound is but he cannot seem to find it Then the Man tells him it is the sound of a cricket. George then tries to track down the cricket and remove it from the house so he can get some sleep.