Disco Inferno (S01E15)

In 1978, fire destroyed a disco, and 23 people died. The partial remains of a body were recently found six feet underneath the building site--in the former VIP room. The victim died of a gunshot wound to the head. Rush and Valens realize the blaze didn't kill the victim and believe that the fire was probably set in order to conceal this murder. Through scientific forensic testing, the dead man is identified as Benny Rosen (Conor Dubin), a disco fanatic and possible cocaine dealer. Rush and Valens delve into the drug and sex-filled world of the disco scene. Though the killing first appears to be drug-related, then a crime of passion, Rush and Valens ultimately discover that an unlikely suspect is responsible for Rosen's murder and the 22 others. (Warner Bros. UK)