Agatha All Along brought back a certain character from WandaVision in a flashback episode that helped Joe Locke's Teen find his way to Agatha Harkness.

Being a quasi-sequel series to WandaVision, Marvel’s Agatha All Along was bound to pick up most of that show’s loose plot threads at one point or another, at least when it came to Agatha or Westview.

We all thought that was the last we would see of Ralph, but the MCU is always full of surprises. In Agatha All Along episode 6, which is titled 'Familiar by Thy Side', Peters returns for a surprise cameo as Ralph during a flashback scene that dives into Teen's life before the Witches' Road.