When Dr. Trey Campbell is sitting with Carly Campbell and says "I don't know what to do with the rest of my life" his voice obviously doesn't match his mouth.
When Trey and Carly come home after their date and wake up Jenny, a boom mic can be seen above them.
After Trey called Carly to tell her he's coming back after quitting his job, you can see a bit of the boom mic hanging above him.