1) “Shark Beach With Chris Hemsworth” (show here), 9 p.m., National Geographic. TV’s shark summer is back: “SharkFest” starts today, for a six-week run on two Nat Geo channels; “Shark Week” is July 11-18 on Discovery. We’ll see lots of creepy creatures, including (at 8 and 10 p.m. today) “When Sharks Attack” and “Rogue Shark?” But “Beach” has a feel-good tone. Hemsworth says he “grew up in paradise” in Australia and surfed at 6. He meets diving veteran Valerie Taylor … and sees his first great white.
2) “Celebrity IOU,” 9 p.m., HGTV. This amiable show has Drew and Jonathan Scott help celebrities renovate homes for people important to them. It’s a good idea – as evidenced by the fact that CBS will debut a similar show Friday. Tonight, Kevin Hart makes a “man cave” for the trainer who helped him after an injury. Reruns at 10 and 11 p.m. have Michael Buble help his late grandfather’s caretaker and LeAnn Rimes help a man who aided her during a dark stretch. These rerun from midnight to 3 a.m.
3) Hockey, 8 p.m. ET, NBC. It’s game four of the best-of-seven Stanley Cup finals, with Tampa Bay and Montreal. That’s on a night when winter sports are finally wrapping up. Basketball has game seven (if needed) of the Eastern Conference finals, with Milwaukee and Atlanta, at 8:30 p.m. ET on TNT.
4) “Bob (Hearts) Abishola,” 8:30 p.m., CBS. In the Nigerian tradition, Dele has consistently done what his mother told him to. Now, in an excellent rerun, he resists. That’s followed by an “NCIS: New Orleans” rerun, but only this time. Next week, Mondays will add some laughs, with reruns of “Young Sheldon” and “United States of Al” at 9 and 9:30.
5) “Silver Linings Playbook” (2012), 5:45 p.m., Showtime. It’s great-movie night on the premium channels. Showtime follows this one with “I, Tonya” (2017) at 8 p.m. HBO goes further back, with “Clueless” (1995) at 8 and “Beverly Hills Cop” (1984) at 10:10. All four have clever scripts, crisp direction and perfect performances.