Blindspot Rich Dotcom (guest star Ennis Esmer) is back, and his presence could mean fresh trouble for the team in this new episode. Jaimie Alexander, Sullivan Stapleton, Ashley Johnson, Archie Panjabi and Michelle Hurd star. 8 p.m. NBC
Arrow Oliver (Stephen Amell) and Lyla (guest star Audrey Marie Anderson) team up to carry out a secret mission for Diggle (David Ramsey), but Felicity (Emily Bett Rickards) disapproves and elects to stay behind. 8 p.m. KTLA
The Goldbergs Adam’s (Sean Giambrone) love for the scary novels of Stephen King inspires him to try his hand at horror writing, but...