Depressive symptoms are the most common referral problem to integrated mental health providers within Veteran primary care clinics. Although there exist several empirically-based brief psychotherapies for depression in primary care, the most significant barrier to providing those psychotherapies is treatment duration (e.g., the treatments range from 6-8 sessions of 30-50 minutes) as it does not match typical treatment formats delivered by mental health providers working in primary care (i.e., 1-4 15-30 minute sessions). Therefore, this HSR&D study titled, RCT of Behavioral Activation for Depression and Suicidality in Primary Care, will examine the effectiveness of a brief version of an existing efficacious longer treatment for depression, called behavioral activation.