Chapter 4, “Plot: External and Internal Action in the Dialogue,” studies plot through statements in the dialogue. External action includes entrances and exits, blocking, physical production, and special activities. External actions form the most immediately apparent level of plot. Internal action refers to effective assertions, commands, and plans. Such actions are called internal because they contain simple psychology. External and internal action in the dialogue of nonrealistic plays is also examined. The chapter concludes with a summary and exercises for a scene or short play.