Supernatural (2005)

S13E4 The Big Empty

After several clients of grief counselor Mia Vallens are found dead, Dean, Sam, and Jack delve into the chilling circumstances behind the killings. As they unravel the mystery, each of them is unexpectedly confronted with their own lingering feelings of grief, leading to personal reflections and challenges. The investigation not only seeks justice for the victims but also compels the trio to face their own emotional struggles.