This is the only scene in all of the I Love Lucy series in which Desi and Lucy shy/turn away from the camera; they were both genuinely crying and it wasn't scripted. The episode is called "Lucy is Enceinte" (Lucy is Expecting). This is the scene where Lucy tells Ricky she's pregnant; Lucy was pregnant in real life as well, and that's why it was such an emotional scene for them. My favorite I Love Lucy moment. Click on it to see it pan out!