She Came in Through the Bedroom Window - S4.E19

Cody's speech teacher tells him he says the word ""dude"" too much. He creates a device whereby someone can press a button and give him an electrical shock every time he uses the word. Dana volunteers and takes her job seriously, ""zapping"" him as much as possible. Cody decides that the word ""dude"" is part of who he is and how he communicates and therefore, quits.

Carol is 8 months pregnant and VERY large. Frank gets a job with a beautiful ex-girlfriend and neglects to tell Carol, feeling she is insecure. Carol finds out about the job, but more importantly finds out that she can trust Frank.