Are there more than Five kingdoms?
Taxonomic classification is a large area of controversial debate. See for example Cavalier-Smith's system of classification, they described eight kingdoms, then six, then 7 kingdoms in subsequent publications.
Other (older) theories describe 6 kingdoms, two prokaryotic (Eubacteria and Archeae) and four Eukaryotic (Protista, Plantae, Fungi, Animalia) See image on Wikipedia's "Kingdom" explanation 
The three domains Eubacteria, Archeae, and Eukaryota are less disputed.