20/20: In an Instant The program’s season finale focuses on an Ohio banker whose family was held hostage by gunmen to ensure his cooperation in a robbery scheme. 8 p.m. ABC
Turn: Washington’s Spies Gen. Washington (Ian Kahn) has a conflict with his French allies over military strategy in a new episode of the Revolutionary War drama. Jamie Bell and Ksenia Solo also star. 9 p.m. AMC
Still Star-Crossed Princess Isabella (Medalion Rahimi) travels from Verona to Venice on a peace mission in a new episode of this now-canceled drama inspired by Shakespeare’s “Romeo and Juliet.” Zuleikha Robinson and Anthony...