Although they do not share scenes, this episode (presumably) reunites series regular Hill Harper and guest star Anna Belknap, who acted together for eight seasons on CSI: NY (2004).
Ryan Robbins and Stephen Lobo also appear in the show Continuum as well. However, they have no scenes together in this episode.
A patient mentions dropping her daughter off at Michigan then going to the same bar on Liberty Street that they met 25 years earlier. However, the only bar that is that old and still open is Old Town Tavern.