The aim of the current study is to assess the efficacy of TMS therapy in the treatment of suicidal ideation in patients with depressive episode(s) and either PTSD or mild TBI or both. It is hypothesized that participants who receive repetitive TMS (Group 1) relative to sham treatment (Group 2) three times daily over three days will evidence more improvement in suicidal ideation from baseline to the end of day 3. Participants will be followed for six months following treatment to assess safety and long-term efficacy of TMS.