Ellie shows up at the hotel room and speed edits a film script, until her smarts and insights throw the whole process in disarray when she realises they need to start over with the script and actually try to understand the character of Beck. After the defenestration she goes back to her own hotel room and is only quickly seen again when she assures Joe she can order an Uber for herself to get home. She knows nothing yet about the whereabouts of her sister.

Nadia grows suspicious of her professor, who is actually Joe, and breaks into his apartment, finds the clues and the key faster than Joe does himself in the next episode and walks in on... Marianne in the cage! This is the latter half of the episode, in the beginning she has words with her 'is he or isn't he' boyfriend.

That was 2x07, I found I had to watch that too since Nadia's story is sort of broken between the episodes.

In 2x08 we get Marianne's story, the nightingale in a cage, for the first 21 minutes. This leads to the moment Nadia walking in on that terrifying scene, but seen from the other side. Nadia tries to free Marianne, call the police, anything, but has to settle for just bringing food and water. She promises to be back with a plan. But this episode Joe grows suspicious of Nadia and almost foils her plans to put the keys back and go to Marianne. The episode ends with Nadia rushing to the cage, just missing being seen by Joe who is finally on his own trail to find the cage, and announcing to Marianne that she has a plan, but that it's a mad one.

Ellie walks in on Joe and Love who have met up the morning after the events of Forty's process. She is still looking for her sister Delilah and proceeds to spend the day cooking with Love. She tells Love about how she came to live with her sister after her father died. Later in the episode she has the arguably most heartfelt moment of the series where she has her 'what's wrong with me' outburst in the kitchen, when she believes her sister has left her.

Nadia is talking to Marianne about the plan to get her out without involving the police, while Joe walks in and she needs to hide around the corner. This is when a panic-stricken Nadia properly sees the madness of her professor, indicating the reality closing in on Joe. When he's gone Nadia and Marianne agree that the only way is for Joe to die. When Nadia is later rushing back after sourcing the drugs and knife needed, she gets into a mishap at the underground access gates and is taken to the police station. Once outside, she receives the remainder of the drugs she needs for plan b that Marianne has set in motion due to the delay. Meanwhile, she has to admit to her 'boyfriend' that she doesn't consider him her boyfriend as this is not the kind of conversation that you can postpone because you're in a hurry.