 The first season of the series was set during World War II. When the  series moved from ABC to CBS the next year, the entire format of the  show was changed with the immortal Wonder Woman returning to  civilization in the late 1970s and teaming up with the son of  Steve Trevor (qv) from the first season (of course played by the  same actor). Lynda Carters costume also underwent some minor  modifications with the changeover.