Tom Skerritt, portraying El's father, appeared in only one episode, along with Debra Monk as her mother, Pulling Strings - Season 3, episode 14. They appear in New York for Elizabeth's birthday.
PHOTO CAPTION and CREDIT: Tom Skerritt speaking at the 2014 Phoenix Comicon Fan Fest at the University of Phoenix Stadium in Glendale, Arizona. Please attribute to Gage Skidmore if used elsewhere. (https://en.wikipedia.org/wiki/Tom_Skerritt)