Sister show

Sister shows are two or more television shows which exist in the same fictional universe and which may have crossovers. They differ to a degree from spin-offs in that shows may air simultaneously, rather than being derived from, and replacing, another. The popularity of most shows is limited to a few seasons, and sister shows allow expanding the immediate audience and ratings share. This is accomplished by using mostly different actors and production facilities. Sister shows often shift styles or target audience slightly, for a larger overall market. Thus "The Beverly Hillbillies" emphasizes slapstick, while "Green Acres" emphasizes surreal humor.

Examples

*', ', and "".:"CSI: Crime Scene Investigation" was joined by a sister show "CSI: Miami" in 2002, and a second, "CSI: NY", in 2004.
*"" and "Xena, Warrior Princess".:The Xena character proved popular on "Hercules" and a second show started.
*"Jack of All Trades" and "Cleopatra 2525".:The shows aired together as part of the "Back2Back Action Hour" on UPN in 2000-2001.
*"Law & Order", ', ', and "".
*"One Life to Live" and "All My Children".:From 2004 to 2005, they featured a crossover storyline told on both shows.
*"Stargate SG-1" and "Stargate Atlantis":"Stargate Atlantis" premiered during the eighth season of "Stargate SG-1". Both occasionally had crossover plots.
*' and ':"Deep Space Nine" began during the sixth season of "The Next Generation". Several characters from the older series appeared in the newer, but only one episode of the older (Birthright (TNG episode)) had characters from the newer. All the Star Trek shows are in the same universe, and there were many shared concepts and characters.
*"Petticoat Junction" and "Green Acres" and "The Beverly Hillbillies":All three take place around the town of Hooterville. Guests appear in "Green Acres", although the plots are not linked.
*The "Trumptonshire" series had Camberwick Green, Trumpton and Chigley villages in the same area. Gordon Murray stated that the area of "Trumptonshire" is "representative of real locations which are one-and-a-half miles from each other in an equidistant triangle." [http://www.t-web.co.uk/trumpvil.htm] . Several characters appear in guest roles in other villages.
*"The Young and the Restless" and "The Bold and the Beautiful":Known for frequent crossovers, the latter was planned by William J. Bell to be a sister show. Characters have gone between the two series regularly since the 1990s.
*"Buffy the Vampire Slayer" and "Angel"