CALM: Managing Distress in Malignant Brain Cancer

Inclusion Criteria: * Self-reported diagnosis of brain metastasis (bMET) or a malignant primary brain tumor (PBT; specifically grade III or IV and CNS diffuse large B cell lymphomas)\* * At least 2-weeks post-surgical resection or biopsy of the brain (if applicable) * Score \> 20 on the TICS * Reported elevated depression (PHQ-9 score ≥ 10) OR death anxiety symptoms (DADDS score ≥ 15) * Ability to read, speak, and understand English * Ability to understand and the willingness to sign a written informed consent document Exclusion Criteria: * Major communication difficulties which would prohibit the psychotherapeutic interaction * Inability to meet with the interventionist via an electronic device for telehealth intervention sessions * Inability to understand and provide informed consent * Prisoners * Medical, psychological, or social condition that, in the opinion of the principal investigator, may increase the participant's risk of adverse events and/or prohibit the individual's participation in the intervention.