In the latest edition of In the Womb, viewers are taken this weekend for a prenatal sneak peek at identical twins. Born from the same single fertilized egg, identical twins not surprisingly retain a similar physical appearance as they grow up.
But this National Geographic Channel special explains that the influences of genes reach beyond physical appearance, affecting personalities, sexual preferences and other characteristics. But despite the similarities that can bond these twins throughout their lives, they are not a 100 percent genetic match. In the Womb also reveals the hidden, and unexpectedly different, world of twin fetal development. (9 p.m. Sunday, National Geographic Channel)
Final house call: Tonight and tomorrow, CSPAN airs the final parts of its seven-part series on the White House. Tonight, The Making of the Documentary, which airs after an encore of Inside America's Most Famous Home, explains the unprecedented access to the White House that enabled that original film. And tomorrow, presidential historians Lonnie Bunch, Doris Kearns Goodwin and Richard Norton Smith are interviewed as well as President George W. Bush and first lady Laura Bush. (9 p.m. today and tomorrow, CSPAN)
Quid pro quo: On tonight's Everyone Hates Chris, mini-Rock (Tyler James Williams) agrees to help a classmate, Angel (Hector A. Garcia), improve his grades if Angel will help him get the attention of Chris' latest crush, Maria (Marisol Esparza). (8 tonight, WNUV, Channel 54)
Late-night guests : James Franco visits The Tonight Show with Jay Leno; Jerry Seinfeld stops by Late Show with David Letterman.
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David Zurawik is on vacation. His column returns next week.