S5, E18: When JD's underachieving brother Dan returns for a surprise visit, Elliott learns that JD has been telling Dan that she's still into him, but when the truth comes out, Dan turns to the Janitor to get back at JD. As everyone reacts to the pregnancy in different ways, Carla and Turk begin to discuss baby names, and despite his promise to Carla, Turk is unable to keep quiet about their initial choices.