1) “Big Sky” debut, 10 p.m., ABC. David E. Kelley has written the best shows on broadcast (“L.A. Law,” “Boston Public”), cable (“Big Little Lies”) and beyond (“Goliath”). Now he returns to broadcast, adapting a novel. We meet two sisters, on an empty Montana highway … and a lonely trucker who lives with his badgering mother ,,, and a highway patrolman in a wobbly marriage. And Cody (Ryan Phillippe, shown here), surrounded by two women – his detective partner and his ex-wife. Soon, they’ll intersect.
2) “NCIS” season-opener, 8 p.m., CBS. Launching its 18th season, the ratings leader again links Gibbs (Mark Harmon) with Fornell (Joe Spano), his former mentor. They team up to find the dealer who gave drugs to Fornell’s daughter. Also, there’s some concern about a body missing from the autopsy room.
3) “This Is Us,” 9 p.m., NBC. Shouldn’t life be easy for a handsome movie star? Kevin’s engagement to Madison (who’s pregnant with their twins) sometimes seems shaky … he still hasn’t apologized to Randall … and now he’s having trouble at work. Also in this hour, Malik (Deja’s boyfriend) shadows Randall (her adoptive father) at work.
4) “FBI” season-opener, 9 p.m., CBS. After a mass shooting at a media company, the team searches for the killers. That’s complicated by “OA” Zidan’s personal connection to the case. Also, there’s a new agent, Tiffany Wallace, played by relative newcomer Katherine Renee Turner.
5) “FBI: Most Wanted” season-opener, 10 p.m., CBS. Two gunmen are taking out their rage on the people they feel are oppressing them during the COVID crisis. As Jess (Julian McMahon) deals with that, he has a distraction: His father (Terry O’Quinn, the “Lost” Emmy-winner) is back, with a new girlfriend and, perhaps, the same old flaws.