Rob Estes, Katee Sackhoff join series

He's relocating to '90210'; she's recurring on 'Nip/Tuck'

Rob Estes is set to star in the CW's "90210," while Katee Sackhoff has joined FX's "Nip/Tuck" as recurring.

In other casting news, Polly Walker has come on board Sci Fi Channel's two-hour pilot "Caprica," Saul Rubinek has been added to Sci Fi's pilot "Warehouse 13" and Michael Weston has been tapped for a multi-episode arc on Fox's "House."

"90210" centers on the Mills, a three-generation Beverly Hills family. Estes will play the father, Harry Mills, who takes a job as principal of West Beverly High, his alma mater, after he moves his family from Kansas.

This is the second "Beverly Hills, 90210" spinoff for Estes, who played Kyle McBride on Fox's "Melrose Place."

Estes, who most recently co-starred in ABC's "Women's Murder Club," is repped by ICM, Thruline and attorney Brad Small.

On the upcoming sixth season of "Nip/Tuck," Sackhoff ("Battlestar Galactica") will play Dr. Theodora "Teddy" Lowe, a new doctor who challenges Sean (Dylan Walsh). She will appear in four episodes.

Also set to appear in the FX drama is Morgan Fairchild, who will play a movie star in one episode.

Sackhoff is repped by manager Leland Labarre and attorney Darren Trattner.

Fairchild is with B.R.S. and McGowan Management.

On the "Galactica" prequel "Caprica," Walker ("Rome") will play Sister Clarice Willow, the gracious, eloquent and duplicitous high priestess and headmistress of the Athena Academy, a private religious school.

In "Warehouse," Rubinek ("Leverage") will play Artie Nielsen, a longtime Secret Service agent in charge of Warehouse 13, a location where the government houses supernatural objects.

On "House," Weston ("Scrubs") will play P.I. Lucas, a private investigator who is as intelligent but not as abrasive as Dr. House (Hugh Laurie). After a trial in a multi-episode arc, the character could become a regular on the hit Fox medical drama or become the center of a spinoff series.