Erica Durance, who plays a woman who seeks justice by dressing up and considering herself to be the DC Comics superheroine Wonder Woman, was previously Lois Lane in the show Smallville (2001) which is part of the DC Comics universe. Lois Lane is a love interest for Superman, who is friends with Wonder Woman. The costume Erica wears had originally been made for Adrianne Palicki for David E. Kelley's failed Wonder Woman (2011) pilot.
Kathy Bates (Harriet Korn, Robert Picardo (Annie's Psychiatrist) and Tony Plana (Judge Tomás Garcia) have all appeared on L.A. Law.
Kathy Bates (Harriet Korn) and Robert Picardo (Annie's Psychiatrist) both appeared in the same episode of China Beach.
Robert Picardo (Annie's Psychiatrist), Bill Smitrovich (Mike Horace) and Tony Plana (Judge Tomás Garcia) have all appeared in the series Castle.
Emily Rose (Natalie), Necar Zadegan (Sarita Radan) and Cory Tucker (Mr. Gerson) have all appeared on NCIS.