Weird or What? (8:00 p.m. EST, DSC)

Do you think about weird things? Or like hearing about them? Then this show is for you. On tonight’s episode, learn about the feasibility of time travel; dolphins who came to the rescue of a man endangered by a shark; pets that predict death; and a toothpick teenager who performed an incredible feat of strength.

The Middle (8:30 p.m. EST, ABC)

The Hecks throw a barbecue, and Mike (Neil Flynn) is concerned that he has passed his social awkwardness on to Brick (Atticus Shaffer). Axl (Charlie McDermott) makes the decision to clean the family pool so that hot chicks in bikinis will come by for a swim; and Sue (Eden Sher) tries to raise money to keep her new friend, a church youth-group leader, with the church.

Mercy (9:00 p.m. EST, NBC)

The season one finale is here. Veronica (Taylor Schilling) helps two children who have become trapped in an abandoned building; a psychic patient played by Aida Turturro makes a prediction about Sonia (Jaime Lee Kirchner); Sands (James Tupper) debates taking a job offer in Afghanistan; and Briggs (James Van Der Beek) does his best to pay off his debt to the mob.