Baby Mama

Starring Tina Fey, Amy Poehler - Written and directed by Michael McCullers - Universal Home Video - $29.95, $39.95 Blu-ray

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Tina Fey and Amy Poehler put the chemistry they honed during their years together on Saturday Night Live to marvelous comic effect in this comedy about a harried career woman (Fey) who has no time to be pregnant so she hires a surrogate and gets more than she bargained for with the irrepressibly earthy Angie (Poehler).

The film's supporting cast couldn't be sharper. The DVD includes deleted scenes, an alternate ending and a brief making-of feature.

One to buy: Grey's Anatomy - Season 4 Expanded (ABC Studios, $59.95, $96.95 Blu-ray ). One of network TV's most entertaining dramas, this set offers episodes extended beyond what was broadcast on TV.

One to avoid: Species Collection (MGM, $39.95). Bad sci-fi four times over, as 1995's Species and its three sequels detail the exploits of hot aliens.

One for the kids : The Sylvester and Tweety Mysteries: The Complete First Season (Warner Home Video, $19.98). That little bird and puttytat make like Holmes and Watson in this TV series.

One for the archive s: How the West Was Won (Warner Home Video, $22.95, $34.95 Blu-ray). While this star-studded 1962 salute to the Old West may be a bit overblown, certain sequences do impress. Directed by John Ford, George Marshall and Henry Hathaway.

Also out this week: Roman Polanski's A Day at the Beach (Navarre Corp., $19.98); TLC's series John & Kate Plus Ei8ht, Seasons 1-2 (Genius Products, $19.98); The Last Days of Left Eye (Anchor Bay, $19.97).