“The Big Bang Theory” (8 p.m., CBS): It sounds like trouble could be brewing on the

“The Big Bang Theory” (8 p.m., CBS): It sounds like trouble could be brewing on the season finale of “The Big Bang Theory.” The gang is concerned when Sheldon’s former admirer, Dr. Ramona Nowitzki (Riki Lindhome), resurfaces while Amy is away at Princeton.

“American Race” (9 p.m., TNT): We find Charles Barkley’s basketball commentary to be highly dubious at times. Even ridiculous. But how will he do when chatting about sociological issues? In this two-night, four-episode special, Sir Charles travels the country to explore the hot-button topic of race from various angles and engage in “thoughtful but spirited dialogue” with a diverse cross section of Americans. His goal? To build the kind of mutual understanding that can lead to productive solutions. Talking smack with Shaq sounds a lot easier.

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