Craig Ferguson (CBS's "The Late, Late Show with Craig Ferguson") and Olympic gold medalist/professional tennis great Serena Williams are the celebrity contestants participating on MILLION DOLLAR PASSWORD

In round one, Derek Arteta from Glendale, Calif., and Nicole Tillman from Belmont, N.J., compete for the $1 million prize. In round two, Maria Pepin from Oaklawn, Ill. and Cheri Carrera from San Bernadino, Calif., compete for the $1 million prize.