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Sheldon's mother won't attend his wedding unless he invites his brother; the Wolowitz kids inadvertently infest Amy, Bernadette, Wolowitz and Koothrappali with pink eye.

When Sheldon bans Penny from the apartment for a series of petty infractions, Penny vows to get revenge.

Murray and Geoff team up to pull Beverly, Barry and Erica out of their shared misery that Lainey has left town; Coach Mellor prepares for the next step of his life.

Claire struggles to find the right time to fire an employee; Phil thinks he caught Luke with a girl; Alex moves back in, seemingly undetected; Jay refuses to believe it might be difficult to re-enter the workforce.

A raw, unfiltered look into the world of sheriff and police departments across the United States as they serve and protect at all costs.

A raw, unfiltered look into the world of sheriff and police departments across the United States as they serve and protect at all costs.

Corey and Rick have a chance to make a deal on a 1980 10th anniversary edition Datsun ZX; 1862 Civil War postage stamp; cast member's script from the 1964 James Bond film "Goldfinger.".

The Pawn Stars meet a man hoping to sell a mysterious coin from the 1800s; the boys head out to the farm to see an early 1900s hand-crank corn-shucker; Rick has a chance to buy an antique gaming wheel commonly used in speakeasies.

Meteorologists encounter weird weather.

Ryan Reynolds and Kenneth Branagh; Neil Patrick Harris; Maria Sten; Jacob Tremblay; H.E.R.; Jessica Rothe; filmmaker Mark Duplass; Joey King; Sterling K. Brown; a hot track from Karol G and Bruno Mars.

Breeding cheetah cubs in South Africa; rare African wild dogs.

Baby animals bring hope for the next generation of wildlife.

The largest monkeys in the world can only be found in Africa's equatorial rain forests.

Conservationists try many options to save the rhino from extinction.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

From Gerald J. Ford Stadium in Dallas.

From Fargodome in Fargo, N.D.

A pre-race lead-up to NASCAR racing.

NASCAR O'Reilly Auto Parts Series teams hit Las Vegas Motor Speedway for the Focused Health 302. Postseason stars fight across 301.5 miles, with defending series champion Jesse Love and Carson Kvapil managing pit strategy for crucial points.

From Snapdragon Stadium in San Diego.