Nancy Travis' NCIS debut as Harriet Parker left one character's life in mortal danger - with Harriet holding the power to save them. Warning: Spoilers below from NCIS season 23, episode 1. During the season 23 premiere, which aired on Tuesday, October 14, fans got a glimpse into Special Agent in Charge Alden Parker's (Gary Cole) childhood with sister Harriet (Travis), as they both processed the murder of their father, Roman (Francis X. McCarthy), in their own way.