Susan Delilah Crumb (formerly Banks and Black) is a fictional character on NBC's daytime drama Days of Our Lives. She was played by Eileen Davidson from November 4, 1996 to April 8, 1998, and again in 2014. Susan is the mother of Elvis "EJ" DiMera, and once acted as Kristen Blake's doppelganger. In November 2011, it was announced that Brynn Thayer would take over the role of Susan, since Davidson was committed to The Young and the Restless. Thayer made her appearance on December 7, 2011.

In June 2012, it was announced that Davidson would reprise the role of Kristen Blake, along with her doppelganger, Susan Banks. In July 2012, The Hollywood Reporter confirmed Davidson to reprise the role of Kristen Blake in October 2012.

In January 2014, it was announced that Davidson would be returning to Days for three-month story arc after having departed with the show in November 2013. In late September 2014, it was announced that Davidson would reprise her role as Susan Banks; her first time portraying the character in 16 years.