Season 2 Ep.10. Angry and impatient that no one seems to be out looking for Brady, Trudy impulsively rushes out on her own. Ellie runs after her, heading for the sewer exit, for Trudy is bound to get hurt outside the Mall. Lex and KC are killing time in the Market area. The scene follows immediately after we saw Trudy heading this way. But we never see her pass through. She must be wearing an invisibility cloak.