John Christopher Dadzie (born June 7, 1982), better known by his stage names 12th Planet and Infiltrata, is an American dubstep producer and DJ hailing from Los Angeles.

Born John Christopher Dadzie, he grew up in South Los Angeles, the youngest of four children. He was first introduced to the electronic music scene in high school. After forming Imperial Recordings with DJ Lith, he launched his production skills on his own terms, originally producing drum and bass under the alias Infiltrata. In 2006, he decided that he was going to make dubstep. It was then that his new alias 12th Planet was created, in reference to Zecharia Sitchin's book, 12th Planet. All production under the name 12th Planet is original. As one of the first individuals to bring the dubstep culture to America (in one of the USA's electronic meccas, Los Angeles) 12th Planet has frequently been cited as the General of the Riddim Gang.

12th Planet worked frequently with Orange County producer Flinch and LA Local Skrillex (on tracks "Needed Change" And "Burst" Along with Kill The Noise). He has also collaborated with various dubstep producers including Datsik, Doctor P, Plastician, Virtual Riot and Skream. Many well-known dubstep DJs (such as Rusko, Skream, Skrillex and more) use 12th Planet's productions and remixes in their live DJ sets.

As a DJ, 12th Planet has toured globally in London, Sydney, Auckland, and across the US. He has also played at many American dance festivals such as Electric Daisy Carnival, Together As One, SXSW, Coachella Valley Music and Arts Festival, Ultra Music Festival, Nocturnal, and Beyond Wonderland. He is represented by AM Only, one of the largest agencies in the electronic music industry.