Brent Spiner has signed on to play the Vice President of the United States in CW's Supergirl, according to Deadline. Wonder Woman's Lynda Carter is scheduled to return this fall as President Olivia Marsdin, with Spiner-as-VP Baker (no first name given) acting as her second.
"Adept and politically minded, VP Baker makes for an unlikely leader, but steps up in a big way when his country needs him most," as Deadline describes Spiner's reported character.
Spiner is best known for playing DATA on Star Trek: The Next Generation, but has played villains in DC animation twice: The Joker in Young Justice and the Riddler in Justice League Action.
Supergirl's fourth season is scheduled to begin October 14 on the CW.