Emma Caulfield Ford As Dottie – Emma Caulfield Ford appears for a short scene as Dottie in WandaVision episode 3. The actress is best known for her role as Anya in Buffy the Vampire Slayer.
David Lengel as Phil Jones – David Lengel returns as Phil Jones in WandaVision episode 3 alongside Dottie. He previously appeared in episodes of Bosch.
David Payton as Herb – David Payton has a few unnerving scenes as Herb in episode 3. Payton recently had roles in Waves and Chicago P.D. before joining WandaVision.
Ithamar Enriquez as Commercial Man – Ithamar Enriquez returns as the mysterious Commercial Man for episode 3. He can be seen in Lady Bird and A Series of Unfortuante Events.
Victoria Blade as Commercial Woman – Victoria Blade returns as the Commercial Woman in episode 3. She previously appeared in episodes of Doom Patrol and The Outsider.
Wesley Kimmel as Commercial Boy – Wesley Kimmel joins WandaVision in episode 3 as Commercial Boy. The young actor previously appeared in The Rookie and Good Girls.
Sydney Thomas as Commercial Girl – Sydney Thomas appears in WandaVision episode 3 as Commercial Girl. She recently had a role in Netflix’s Tall Girl.
Rose Bianco as Mrs. Nielson – Rose Bianco joins WandaVision in episode 3 as Mrs. Nielson, the wife of Doctor Nielson. Bianco most recently appeared in Cobra Kai as Rosa, the grandmother of Miguel Diaz.
Originally from https://screenrant.com/wandavision-episode-3-cast-marvel-character-guide/