LOS ANGELES (Hollywood Reporter) - Three actors have joined three new network shows as series regulars: Ian Anthony Dale in NBC’s drama "Surface," Amanda Walsh in ABC’s comedy "Sons & Daughters" and Rhea Seehorn in Fox’s drama "Head Cases."

Dale ("Mr. 3000") will play Davis Lee, who works at the Pentagon, in "Surface," a drama about mysterious creatures of the deep sea. Previously known as "Fathom," the show stars Lake Bell, Rade Sherbedegia, Jay R. Ferguson and Carter Jenkins.

Walsh is joining "Sons & Daughters," a midseason entry about three adult siblings, in the role of Jenna, a single mother who is the younger stepsister of Fred Goss’ and Alison Quinn’s characters. Walsh stars in the upcoming indie feature "These Girls" opposite David Boreanaz.

In "Head Cases," a drama about an odd-couple pairing of lawyers (Chris O’Donnell and Adam Goldberg), Seehorn will portray Nicole, the assistant to O’Donnell’s character. Her TV credits include the ABC series "I’m With Her."