Episode description:  The teens of Berk find a mysterious girl named Heather on Thor's Beach. While Hiccup and the other teens openly welcome the newcomer, Astrid's jealousy turns to suspicion when she notices Heather is taking an unusual interest in the Book of Dragons. Unfortunately it is found she was working with the Outcasts and, despite the Dragon Riders' effort, she manages to give the ancient Book of Dragons to Alvin.

**Main Cast:**

* Jay Baruch- [Hiccup](http://www.imdb.com/character/ch0184179/?ref_=ttfc_fc_cl_t1)
* Zack Pearlman- [Snotlout](http://www.imdb.com/character/ch0137639/?ref_=ttfc_fc_cl_t2) 
* Christopher Mintz-Plasse- [Fishlegs](http://www.imdb.com/character/ch0137638/?ref_=ttfc_fc_cl_t3)
* America Ferrera- [Astrid](http://www.imdb.com/character/ch0137641/?ref_=ttfc_fc_cl_t4)
* T.J. Miller- [Tuffnut](http://www.imdb.com/character/ch0182921/?ref_=ttfc_fc_cl_t5)
* Nolan North- [Stoick](http://www.imdb.com/character/ch0137637/?ref_=ttfc_fc_cl_t6)
* Chris Edgerly- [Gobber](http://www.imdb.com/character/ch0182922/?ref_=ttfc_fc_cl_t7)
* Julie Marcus- [Ruffnut](http://www.imdb.com/character/ch0182043/?ref_=ttfc_fc_cl_t8)
* Thomas F. Wilson- [Bucket](http://www.imdb.com/character/ch0363607/?ref_=ttfc_fc_cl_t9)
* Stephen Root- Mildew
* Tim Conway- Mulch 
* Andree Vermeulen- [Ruffnut](http://www.imdb.com/character/ch0182043/?ref_=ttfc_fc_cl_t12)
* Mark Hamill- [Alvin the Treacherous](http://www.imdb.com/character/ch0416679/?ref_=nm_flmg_act_111)

List of Episodes can be found: [here](http://en.wikipedia.org/wiki/List_of_DreamWorks_Dragons_episodes#Season_2:_Defenders_of_Berk_.282013.E2.80.932014.29)

Riders of Berk episode 10: "The Heather Report" discussion thread