The Secret World of Alex Mack is an American television series that ran on Nickelodeon from October 8 , 1994 to January 15 , 1998 , replacing `` Clarissa Explains It All '' on the SNICK line-up .
The Secret World of Alex Mack was an American television series that ran on Nickelodeon from October 8 , 1994 to January 15 , 1998 , replacing `` Clarissa Explains It All '' on the SNICK line-up .