Werewolf of London (1935), starring Henry Hull, Warner Oland,  Valerie Hobson

In Universal Picture’s first werewolf film, the 1935 Werewolf of London, there are several themes woven together. One is simply that of a scientist seeking to expand knowledge — Dr. Wilfrid Glendon (Henry Hull), who’s traveling in Tibet, looking for a legendary flower. In his quest, he enters a “forbidden valley” where he’s attacked by a wolf-like creature; but he manages to return alive with the flower regardless.