2012 Summer Olympics (NBC) - You can check to see when and where games are playing on the NBC Olympics schedule page. Highlights include track and field relay races, the men's pole vault and BMX finals. Tips on watching the Olympic games.
 
Unusual Suspects (9pm, Discovery) - In the Season 3 premiere, an attack on a Pennsylvania family that left only one survivor.

Common Law (10pm, USA) - In the Season 1 finale, Wes and Travis (left) finally share the story of what landed them in therapy.

Chasing UFOs (10pm, NGC) - Erin, Ben and James travel to Varginha, Brazil, known as the "Roswell of South America," because numerous UFO sightings have been reported there. The team investigates rumors of alien life forms hiding in the jungles just outside the city.

The Dead Files (10pm, Travel) - In the Season 2 opener, a dentist claims that his home office in Huntington, West Virginia, is haunted. Amy and Steve investigate.

Comedy Bang! Bang! (10pm, IFC) - Guests for the Season 1 finale are "Weird Al" Yankovic and Tenacious D.

Lost Girl (10pm, Syfy) - Bo becomes entangled in Fae politics while she tries to save some important people.

2012 Summer Olympics (NBC) - You can check to see when and where games are playing on the NBC Olympics schedule page. Highlights today include lots of swimming (featuring Cullen Jones, Missy Franklin, Michael Phelps), women's volleyball, and women's diving. More tips on watching the Olympic games.

Swamp Wars (9pm, Animal Planet) - Snake night! In the first episode, a rattlesnake swims in a pool and another is found hiding in a car. In a 10 p.m. episode, a child is bitten by a coral snake and falls into a coma. If you watch, the nightmares are

Common Law (10pm, USA) - Wes confides in Travis about dreams he's had about Dr. Ryan, which turns out to be a mistake. Elsewhere, Dr. Ryan's fiance may be withholding information about a body found at his construction site.

Lost Girl (10pm, Syfy) - Bo poses as a teacher to investigate a mysterious case, and Lauren returns from her vacation.

Real Life: The Musical (10pm, OWN) - Marilu Henner's teen son Nick wants to thank a favorite high school teacher, with the help of Mark Ballas of "Dancing with the Stars."

Chasing UFOs (10pm, NGC) - Claims that aliens are watching Earth from above are investigated near the Kennedy Space Center in Florida.

Deadliest Catch (8pm, Discovery) - In two episodes, ice creates problems on the opilio-crab grounds, prompting some captains to leave, and one of the vessels suffers a blackout.

Tyler Perry's For Better or Worse (9pm, TBS) - In the Season 2 opener, questions about fidelity still plague Marcus and Angela's relationship, and Tyrik lands a job renovating the salon.

The Ricky Gervais Show (9pm, HBO) - Topics in the Season 3 finale include Karl's thoughts on the insect world and his diary entries about cutting avocados.

John Leguizamo's Tales from a Ghetto Klown (10pm, UNC-TV) - Actor-playwright John Leguizamo's rise to success is chronicled in this profile, which features remarks from him, his family and friends. The documentary also examines his decision to take his one-man Broadway play, "Ghetto Klown," to his native Colombia.

Common Law (10pm, USA) - Wes and Travis investigate a cop's shooting and take care of the injured officer's police dog.

Louisiana Lockdown (10pm, Animal Planet) - Slater's marriage ends after 10 years, making him a single father. Meanwhile, an inmate prepares for his first rodeo and a former champion is ready to ride again.

Chasing UFOs (10pm, NGC) - Ryder, Ben and james visit the alleged UFO crash site in Roswell, New Mexico.

The Ricky Gervais Show (9pm, HBO) - Topics include Ricky and Stephen watching soccer's World Cup while sharing a hotel bed and the problems of overzealous sports fans.

20/20: Heaven - Where is It? How Do We Get There? (9pm, ABC) - Barbara Walters explores the meaning of heaven with religius leaders, scientists, people who say they've been there, celebrities who are vocal about their beliefs, and with terrorists.

Louisiana Lockdown (10pm, Animal Planet) - A nighttime manhunt requires a K-9 unit. Also, a prison wedding is planned but it must have the warden's approval, and an inmate hopes his hard work will get him out of the disciplinary unit.

Chasing UFOs (10pm, NGC) - The visits Colorado's San Luis Valley, a hot spot for UFO sightings, to investigate reports of animal mutations and alien abductions. A man who claims to have been abducted by aliens shares his story.

Comedy Bang! Bang (10pm, IFC) - Seth Rogen talks about going on vacation, and Reggie paints a portrait of Scott.

Randy to the Rescue (10pm, TLC) - Randy is in Dallas to urge an overprotective father to let his daughter wear a strapless ball gown with her cowboy boots. Meanwhile, two women, including a Dallas Cowboys cheerleader, confront their uncompromising mothers.

Celebrity Vacation Homes (9pm, HGTV) - A new series that features tours of posh holiday retreats looks at President Obama's vacation home in Oahu, Jennifer Aniston's Mexican villa in Los Cabos, and Pamela Anderson's Malibu beach house.

Chasing UFOs (9pm, NGC) - The press release for this new show provided my favorite wacky fact of the week: "A National Geographic Channel survey finds that two-thirds of Americans think Barack Obama is better suited to handle an alien invastion than Mitt Romney." I kinda love that people have opinions about that! But about the show ... "Chasing UFOs" is a new National Geographic Channel series in which a team of investigators -- comprised of a believer, a skeptic and an undecided -- look into alien-related mysteries. The first episode probes mysterious lights in the sky over two Texas towns. A second episode at 10 looks at claims the government uses alien aircraft to spy on citizens in central California.

Common Law (10pm, USA) - Travis and Wes swap lives during an exercise to help them better understand one another. Though the experience puts a strain on their relationship, it also ends up shedding light on a case they're working.

Mariachi High (10pm, UNC-TV) - A documentary tracking a year in the life of Mariachi Halcon, a top-ranked high school mariachi band from Zapata High in Zapata, Texas.

Louisiana Lockdown (10pm, Animal Planet) - A man meets his grandson for the first time when they are both behind bars, and a deceased inmate is buried in the prison's cemetery.