The appellant told his cousin that he planned to order a gun and ammunition to kill his stepbrother, and those statements were relayed to a physician who considered them to be credible threats and who recommended an extended commitment for treatment in accordance with § 303 of the Mental Health Procedures Act. The articulation of a specific plan to harm an identified target is sufficient to prove an act in furtherance of a threat to commit harm, and so is sufficient evidence that the appellant posed a clear and present danger of harm to others. In re: S.O., ___ A.3d ___, 2023 PA Super 31 (2023).