What do you get when you combine a serious look at various medical disciplines and goofy slapstick comedy? Something called “Doctorology” (7 p.m. today, Discovery Health). Every week, the 13-part series takes on a specific field. Tonight’s installment on neurology offers interviews with specialists who explain why they entered this field concerned with the relationship between the brain, the nerves and the body, and how they diagnose and treat migraine headaches, epilepsy and Lou Gehrig’s disease. Just why the producers thought that “Doctorology” needed the antics of Leslie Nielsen to keep our attention is anybody’s guess. The star of “Naked Gun” and “Airplane” comes and goes, knocks over equipment and falls on his face in ways that add little to the proceedings.

¢ “Alison Krauss: A Hundred Miles or More” (8 p.m. today, GAC) features Krauss and her band, Union Station, as well as performances by Brad Paisley and James Taylor.

¢ Recent reports put the cost of the Iraq war at roughly $12 billion per month. That’s a lot of taxpayer money. Where does it go? And who profits from these contracts? Filmmaker Robert Greenwald introduces his documentary “Iraq for Sale” (9 p.m. today, Starz Cinema), a look at some of the private firms that have been awarded no-bid contracts and have gone on to do interior work, provide troops with tainted water and who have punished whistleblowers who exposed their unethical behavior.

¢ The two-hour documentary “Secrets of Egypt’s Lost Queen” (8 p.m. Sunday, Discovery) combines elements of “Indiana Jones” and “CSI” to reveal the location of the mummy of the Hatshepsut, a female Pharaoh whose reign was so controversial that future rulers had all of her images erased or defaced so she would be lost to posterity. Or so they thought.

Tonight’s highlights

¢ A mother (Jamie Lee Curtis) and daughter (Lindsay Lohan) switch identities in the 2003 remake of “Freaky Friday” (7 p.m., ABC). Not to be confused with the 1998 remake of “The Parent Trap” (5 p.m. and 8 p.m., Family), also starring Lohan.

¢ Paula Deen hosts “The Deen Family Vacation” (8 p.m., Food). I hope they pack enough butter.

¢ Brad Johnson, Kelly McGillis and Bianca Lawson star in the 2007 shocker “Supergator” (8 p.m., Sci Fi).

Sunday’s highlights

¢ Repeat stories scheduled on “60 Minutes” (6 p.m., CBS): DNA evidence; a defector to North Korea; a “Simpsons” creator’s dogged pursuit.

¢ Scheduled on “Dateline” (6 p.m., NBC): a polygamist minister linked to murder.