Wednesday's TV highlights: The CW's 'Riverdale' on KTLA

The Blacklist Tom (Ryan Eggold) is missing and Liz (Megan Boone) retraces his last steps before he disappeared to try to find him. James Spader, Harry Lennix and Diego Klattenhoff also star in the crime drama’s fall finale. 8 p.m. NBC

Riverdale The mayor’s (Robin Givens) actions stoke tensions...