Mary and Bobby Trevor are castaways befriended by Tarzan. When Lord arrives, looking for the family heir, Black John tries to fill that role and marry Mary in England. Tarzan shows up and marries her instead.
Unfortunately the movie Tarzan the Mighty is not yet available on HBO Max.
| Directing | Ray Taylor | Director |
| Writing | Edgar Rice Burroughs | Novel |
| Writing | Ian McClosky Heath | Screenplay |
| Directing | Jack Nelson | Director |
