Final answer:
In a state where the Tarasoff case applies, if a client demonstrates imminent danger, it is the duty of mental health professionals to take appropriate action to protect potential victims.
Step-by-step explanation:
In a state where the Tarasoff case applies to practice, if you have a client who demonstrates imminent danger, the next step is to take appropriate action to protect the potential victim. The Tarasoff case established a duty for mental health professionals to warn intended victims when the client poses a serious threat. This may involve notifying law enforcement or the person who is threatened, or taking steps to ensure the client receives appropriate treatment and supervision.