Tarzan Escapes is OK, though not a patch on its predecessors, Tarzan the Ape Man (1932) and Tarzan and His Mate (1934). Most interestingly, it was originally shot as Tarzan Returns in 1935, but this film was completely remade, largely because it 'lacked a central plot menace'. Paradoxically, what was cut from Tarzan Returns was its biggest 'plot menace' - a Giant Vampire Bat sequence, set in a swamp, which would have been great! Tarzan Escapes retains the swamp sequence but with giant lizards only and no bats. I've seen stills and production drawings of the prop bats and they were wonderful creations (as ridiculously large as the crocs were in these movies), with flashing red eyes... What a shame that we'll never get to see this version!