When the Rangers spot Alpha scanning Zhane and overhear the robot telling him that he hasn't much time left, the Rangers jump to the wrong conclusion and assume Zhane is dying! Zhane, who's really just unable to Morph for more than 2 minutes at a time, decides to play up this misunderstanding, and exploits their sympathy. Astronema, though, knows his true secret, and sends the Praying Mantis monster out to use the knowledge to destroy the Silver Ranger once and for all. (thetvdb.com)