Serial, the hit podcast from This American Life producer Sarah Koenig, delves into the true crime story of the 1999 murder of Hae Min Lee, a senior at Woodlawn High School in Baltimore County, Maryland. The most important people in the story are Hae; Adnan Syed, serving a life sentence for her murder; and Jay, a friend of Adnan's whose testimony connected him to the crime.

But there are dozens of other friends and acquaintances of Hae's, Jay's, and Adnan's who also play important roles. They're all real people and, since there’s so many of them, keeping track of how they fit in can be difficult. That’s why we built this tool to show how they all relate to each other into the narrative Koenig is unfolding. You can see all the characters in each episode below, listed in order of appearance along with a timestamp and a brief description of their role in the plot. We’ll keep updating this week after week as new episodes air — and any new characters appear.