Nonlinear Realizations in Tensorial Superspaces and Higher Spins

In the first part of the talk I report on surprising relations between higher spin (HS) theory and nonlinear realizations of the supergroup OSp(1|8), a minimal superconformal extension of N=1, 4D supersymmetry with tensorial charges. The second part is a review of the ``master'' model of HS particle which makes manifest the classical equivalence of two previously known HS particle formulations and gives rise to new massless HS multiplets.