'Supergirl's' Brent Spiner Exits as Season 4 Role Recast With Bruce Boxleitner

Brent Spiner - premiere of 'Independence Day Resurgence -Getty-H 2018

Supergirl is doing a little reshuffling ahead of season four.

The CW's superhero drama previously announced that Brent Spiner had booked a recurring role in season four, playing the key role of Vice President Baker. However, scheduling issues have forced the Star Trek grad to depart the series in order to attend to a family matter that conflicts with the production dates.

Bruce Boxleitner (Tron, Babylon 5) will take over as Baker, who is described as adept and politically minded, an unlikely leader who steps up in a big way up when his country needs him most.

Boxleitner's credits include a recurring role on NCIS, where he played a vice admiral; as well as parts on Heroes, Cedar Cove, Chuck and GCB.

The introduction of the vice president will likely be tied in to the growing anti-alien movement in National City. With the POTUS (played by Wonder Woman vet Lynda Carter) secretly hiding that she's an alien disguised as a human, does this mean her secret will get out and Baker will be forced to take her place in office?

Boxleitner isn't the only new face joining Supergirl season four. Transgender activist Nicole Maines is making history by playing TV's first trans superhero in the series regular role of Nia Nal aka Dreamer. Smallville alum Sam Witwer is playing anti-alien antagonist Agent Liberty. April Parker Jones will play Col. Haley, a hardline career military woman. David Ajala will take on the recurring role of Manchester Black, based on the iconic DC Comics character. Rhona Mitra will play Mercy Graves, an ex-CADMUS agent/bodyguard championing the growing "human-first" movement while Robert Baker will play Otis Graves, Mercy’s brother and right-hand man.

Supergirl returns for season four on Oct. 14 at 8 p.m. on The CW's new night, Sunday.