<P> On numerous occasions, television specials have been aired for the series in which the usual events of regular episodes are altered, threatened, or replaced . Usually said specials will present Dora with a bigger, more whimsical adventure than usual or with a magical task that must be fulfilled, or perhaps even offer a series of different adventures for Boots and Dora to travel through . They might be presented with an unusual, difficult task (such as assisting Swiper in his attempts to be erased from Santa Claus's Naughty List) that normally is not featured in average episodes, or challenge Dora with a goal that must be achieved (such as the emancipation of a trapped mermaid). Sometimes, the specials have involved the debut of new characters, such as the birth of Dora's superpowered twin baby siblings and the introduction of the enchanted anthropomorphic stars that accompany Dora on many of her quests . </P> <Ul> <Li> Dora Márquez (aka Dora the Explorer): Kathleen Herles (2000--2007), Caitlin Sanchez (2008--2011), Fátima Ptacek (2012--2014) </Li> <Li> Boots: Harrison Chad (2000--2007), Regan Mizrahi (2008--2012), Koda Gursoy (2012 - 2014) </Li> <Li> Backpack: Sasha Toro (2000--2007), Alexandria Suarez (2008--2014) </Li> <Li> Swiper: Marc Weiner (2000--2014) </Li> <Li> Map: Marc Weiner (2000--2014) </Li> <Li> Isa the Iguana: Ashley Fleming (2000--2007), Lenique Vincent (2008--2011), Skai Jackson (2012--2014) </Li> <Li> Tico the Squirrel: Jose Zelaya (2002--2007), Jean Carlos Celi (2008--2014) </Li> <Li> Benny the Bull: Jake Burbage (2000--2007), Matt Gumley (2008--2014) </Li> <Li> Big Red Chicken: Chris Gifford (2000--2014) </Li> <Li> Explorer Stars: Christiana Anbri, Henry Gifford, Katie Gifford, Aisha Shickler, Muhammed Cunningham, Jose Zeleya </Li> <Li> Diego: Felipe and Andre Dieppa (2003--2006), Jake T. Austin (2005--2010), Brandon Zambrano (2011--2012), Jacob Medrano (2012--2014) </Li> <Li> Elaine Del Valle - Val the Octopus, various </Li> <Li> Eileen Galindo - Mrs. Marquez </Li> <Li> Chris Gifford - Big Red Chicken, Grumpy Old Troll, various </Li> <Li> K.J. Sanchez </Li> <Li> Adam Sietz - Boots' Daddy, various </Li> <Li> Leslie Valdes </Li> <Li> Marc Weiner </Li> </Ul> <Li> Dora Márquez (aka Dora the Explorer): Kathleen Herles (2000--2007), Caitlin Sanchez (2008--2011), Fátima Ptacek (2012--2014) </Li> <Li> Boots: Harrison Chad (2000--2007), Regan Mizrahi (2008--2012), Koda Gursoy (2012 - 2014) </Li>

Who does the voice of dora the explorer