Spider-Man (1967): Season 2 - Episode 5 (Menace From The Bottom Of The World)

When a city bank mysteriously vanishes into the street, J. Jonah Jameson sends a reporter named Hammond to investigate, while sending Peter to visit a scientist who has recorded voices supposedly from the center of the earth. Peter visits the scientist, and when a recording is played for him, he discovers it is the men, or beasts, who made the bank disappear, and they are plotting another one. Realizing it is only a few minutes until the plot is carried out, Peter becomes Spidey & heads for the bank. Sure enough, the bank disappears into the earth! Spidey follows it down & finds a strange kingdom of creatures, the Mole-Men. When the leader announces a plan to subjugate the people who were in the building when it was taken, Spidey moves into action & overpowers the Mole-Men, and both they & their hostages will be in for a surprise.

IMDb: https://www.imdb.com/title/tt0826470