the ensemble cast is engaging enough to keep you from shifting in your chair too often 
(ROOT (S (NP (DT the) (NN ensemble) (NN cast)) (VP (VBZ is) (ADJP (VBG engaging) (RB enough) (S (VP (TO to) (VP (VB keep) (NP (PRP you)) (PP (IN from) (S (VP (VBG shifting) (PP (IN in) (NP (PRP$ your) (NN chair))) (ADVP (RB too) (RB often))))))))))))
(ROOT (S (NP (DT ) (NN ) (NN )) (VP (VBZ ) (ADJP (VBG ) (RB ) (S (VP (TO ) (VP (VB ) (NP (PRP )) (PP (IN ) (S (VP (VBG ) (PP (IN ) (NP (PRP$ ) (NN ))) (ADVP (RB ) (RB ))))))))))))