The Future is Wild (2007) - Season 1 Episode 16 -

C.G. tests a fast growing crop in the Antarctic Forest, 100 million years in the future. Simile, a false spitfire bird must defend her eggs from spitfire birds and (so she thinks) Emily and Ethan! In this episode, it is hinted that CG and Luis have a crush on each other. Also Ethan may like Emily, by the way he tried to protect from the false spitfire bird and blushed when she thought it was a hug.