<Tr> <Th> Family </Th> <Td> Margo Jane Wheeler (Daughter) Colin John Ledger (Ex-fiancé) </Td> </Tr> <Tr> <Th> Partner </Th> <Td> Mike Logan Zack Nichols </Td> </Tr> <P> Megan Ann Wheeler is a fictional character portrayed by Julianne Nicholson on the NBC - USA Network series Law & Order: Criminal Intent . </P> <P> Megan Wheeler becomes a detective in the Major Case Squad when she replaces Carolyn Barek (Annabella Sciorra) as Mike Logan's (Chris Noth) partner . She transfers in with the new captain, her mentor Danny Ross . She had worked undercover for three years--including assignments on vice, drugs, and white - collar crime--and handled a money laundering probe with Ross . </P>

Who played wheeler on law and order criminal intent