The New Guy
During her incarceration in Season 3, Helena has no corporeal body, and is instead a holographic image. Her consciousness is projected by an artifact allowing her to converse while preventing any physical interaction. While in this state she persuades Myka to return to work at the Warehouse in the premiere "The New Guy", and is not seen again until she is brought in for consultation on a case she unsuccessfully worked in 1893 as shown in "3...2...1..."