Based on the ratings provided, it seems like "Prison Cell 211" gets better as the season progresses. The ratings for Season 1 Episode 1 to Episode 4 improve from 7.9 to 8.2. However, Episode 5 and Episode 6 received lower ratings of 7.1 and 6.7 respectively. Therefore, the show gets worse towards the end of the season, with Episode 6 being rated as awful. The bingeable rating for "Prison Cell 211" based on the provided data would be around 60.
