Cool Things From Flipper: The Mini Submarine

Debuting in the show's first season was a miniature two-man submarine. Painted a bright orange, this little sub showed up again the next season piloted by the stunning Swedish oceanographer Ulla Stromstead.

The idea of a small submarine like this is realistic, and there are now many submersibles of this size in operation. But the Flipper sub was an illusion. Although it was real to the extent that it was powered and operated underwater, it was not an airtight vessel. A "wet" sub, it had no glass in its portholes and was piloted by a diver wearing scuba gear.

But it was thoroughly convincing onscreen, and served duty not only in Flipper, but in movies such as Around The World Under The Sea and Hello Down There (both Ivan Tors productions).