For two seasons, Fringe featured The Walking Dead actor Kirk Acevedo as FBI agent Charlie Francis. Charlie was a close friend of series protagonist Olivia Dunham (Anna Torv before she starred in Netflix’s hit show Mindhunter). He often risked his career to help her and her Fringe Division colleagues Peter Bishop (Joshua Jackson), Walter Bishop (John Noble) and Astrid Farnsworth (Jasika Nicole) as they dealt with paranormal phenomena. Unfortunately during the second season, Francis is killed by a shapeshifter. Here’s who Charlie Francis is and why Kirk Acevedo left Fringe.