In this undated photo from NBC, Chris Noth plays police Detective Mike Logan on NBC’s “Law & Order:Criminal Intent.” His guest appearance this weekend on the show is the start of something big. Noth, who left the original “Law & Order” 10 years ago, will become a regular on the spinoff beginning next season, series spokeswoman Pam Ruben Golum said Tuesday, Feb. 8, 2005.(AP Photo/NBC Universal,Virginia Sherwood ) ORG XMIT: NYET174