4. Iso Tank

Patsy helps Edina break in her new isolation tank upstairs, while Saffy works with classmates on a presentation for her sixth form college's open day. Edina, feeling useless after a newly dedicated and proficient Bubble hauls charge of the office, takes a sudden interest in her daughter's work and begs to be invited to the open day. Saffy vehemently refuses, so Edina spitefully threatens to adopt a Romanian orphan.