Shaving cream disappears from Benjamin's face when Margot is shaving him.
The painting is assumed to be the real one due to the paint going all the way to the edge, and it does completely. In the first episode when the painting is being stolen, the paint is not neatly all the way to the edges. There is a white jagged border between the paint and the edge of the canvas. The painting was confirmed to be the original by the museum stating it was not damaged in the theft, that the thief was indeed a professional.
In the obituaries shown at the end of the episode, the obituary to the left of "Michael Thorne" for Jason Schnitzer has multiple typos. For example, it changes the possessive pronoun, saying, "Jason donated generously and often held private screenings...in HER uptown apartment." One area the word "woife." Also, the material in the first and second paragraphs repeat themselves.