If the process of clearing the rights to the song is prohibitively expensive for the home video distributor, or clearance is refused by the copyright holders of the original song, the affected song is either replaced with a similar one (such as a rerecording or a generic soundalike), or the footage containing the copyrighted song is edited out. In a few cases, television shows, with extensive use of copyrighted music whose cost of "after-market" licensing is high, are withheld from release on DVD; notable examples include "The Wonder Years", "Murphy Brown", "Happy Days", "WKRP in Cincinnati", "Third Watch" (beyond its first two seasons), "Daria", and "Cold Case", some of which were eventually released after long delays. Sony Entertainment cancelled the planned October 2007 DVD release of "Dark Skies" for that reason, but it was eventually released on January 18, 2011 through Shout! Factory.