Editor's note: The below contains spoilers for The Bear Season 4.

Over the last four seasons, has quickly become synonymous with guest stars, with each new batch of episodes bringing in new A-listers to play extended family members or restaurant staff. However, the return of as troubled Berzatto matriarch Donna in Season 4 cements the reality that she is the only guest star who ever mattered. Curtis has brought out her character's nuances with every new appearance, despite only ever appearing in a handful of episodes, which in turn provides significant context to the different behaviors of the Berzatto children. However, Season 4 gives more insight into Donna's mindset, and her narrative arc becomes much more complex than at first glance.

Curtis may have already won an Emmy for her work on The Bear, but her appearance in the penultimate episode of Season 4 is easily her best performance on the show. She conveys a totally different side to Donna compared to the erraticism seen in “Fishes,” while also retaining that believability that this is the same woman who once drove her car through a wall. Her control in ensuring this balance is evidence enough that she is leagues above any other guest star in The Bear’s short history.