Marc Blum was another "Law & Order" guest star extraordinaire, appearing as three different characters on four separate episodes of the procedural. The actor twice played a defense attorney, once an expert witness, and once a fertility doctor with nefarious intentions. Talk about range! 

Sadly, though, Blum's incredible acting career was cut short when, in 2020, he died at age 69 from COVID-19 complications. 

Playwrights Horizons, a NYC-based theater company that Blum was heavily involved with, wrote on Twitter, "Thank you, Marc, for all you brought to our theater, and to theaters and audiences across the world. We will miss you." And Blum will surely be missed by many in the entertainment community and beyond, as the actor not only starred in many off-Broadway theater productions but also appeared in tons of fan-favorites like "Desperately Seeking Susan," the HBO series "Succession," the Netflix thriller "You," and "Mozart in the Jungle" from Amazon.