What to Watch on Tuesday: There’s Halloween costume drama on ‘The Conners’

The Connors (8 p.m., ABC) - An email from the school banning certain Halloween costumes (including Mark’s) sparks an argument between Dan and Darlene.

This Is Us (9 p.m., NBC) - Struggling with Toby’s depression, Kate seeks Rebecca’s advice. Meanwhile, Randall spends time with Kevin, who is obsessing about Jack’s past.

The Rookie (10 p.m., ABC) - After Nolan and Talia lose control of a crime scene, they begin to debate whether people are fundamentally good or bad.

Frontline: The Facebook Dilemma (10 p.m., PBS / UNC) - We get the second part of the two-part Frontline series about the impact of the social media platform on society and democracy.