Tuesday’s Highlights

SERIES

Explorer: The new episode “Electronic Armageddon” details the adverse effects a high-altitude magnetic pulse could have on modern society (7 and 10 p.m. National Geographic).

Hell’s Kitchen: The contestants prepare a meal for hungry college students in this new episode (8 p.m. Fox).

Kathy Griffin: My Life on the D-List: The red-headed comic and actress returns with another season of her Emmy-winning reality series; Liza Minnelli guest stars (9 p.m. Bravo).

Double Exposure: This new reality series offers a behind-the-scenes look at the photographic team Markus Klinko and Indrani (10 p.m. Bravo).

Dinner With the Band: Vega is the latest act featured on this music, food and chat show (10:30 p.m. IFC).

SPECIALS

Presidential address: Broadcast channels and cable news outlets will offer live coverage of President Obama’s remarks on the oil catastrophe in the Gulf of Mexico (5 p.m.).

Pavarotti: The Duets: The late operatic tenor is featured in this musical special (8 p.m. KCET).

MOVIES

Valkyrie: Tom Cruise dons a German colonel’s uniform for this fact-based 2008 WWII drama (9 p.m. Showtime).

The Shootist: John Wayne gave his last on-screen performance in director Don Siegel’s 1976 western; Lauren Bacall and Ron Howard also star (11 p.m. TCM).

SPORTS

Soccer: Play continues at the World Cup in South Africa as Ivory Coast challenges Portugal (6:30 a.m. ESPN) and Brazil meets North Korea (11 a.m. ESPN).

Baseball: The Dodgers visit the Reds (4 p.m. KCAL); the Phillies play the Yankees, or the Rays battle the Braves (4 p.m. MLB); and the Angels host the Brewers (7 p.m. FSN).

Basketball: The Lakers host the Celtics in Game 6 of the NBA Finals (6 p.m. ABC).