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Terror
A scientist experimenting with plant life on a remote island has run into trouble. A shore party from Seaview arrives only in time to hear his dying warning that the world will be taken over in eight hours. Nelson brings aboard the only unusual thing he can find -- a red orchid, which proves to be a malign alien (that proceeds to take over his mind and those of the crew).
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Other episodes for this season
![Fires of Death](https://image.tmdb.org/t/p/w300/5Bf912rq93v5d5izeUYmMK1i6Sk.jpg)
![The Deadly Dolls](https://image.tmdb.org/t/p/w300/vVaAAMVfjd42hFwP8upbx3GQmil.jpg)
![Cave of the Dead](https://image.tmdb.org/t/p/w300/jjtvsMD9dL53WO57oR20btFHSwS.jpg)
![Journey with Fear](https://image.tmdb.org/t/p/w300/9Jb3v6ACaB0FJCUY6QqlT5Y3jCd.jpg)
![Sealed Orders](https://image.tmdb.org/t/p/w300/fh9SsLm6EcYujIgnCbgtqDWbpqp.jpg)
![Man of Many Faces](https://image.tmdb.org/t/p/w300/srS3tNjbCnbuKbuXIeEKpihtjD5.jpg)
![Fatal Cargo](https://image.tmdb.org/t/p/w300/jRFSriKIaQUTi2LkUf2ujp63svf.jpg)
![Time Lock](https://image.tmdb.org/t/p/w300/hnXIY31QMOMH3xGR9fPp2HSDjfE.jpg)
![Rescue](https://image.tmdb.org/t/p/w300/dfpRU0GFfuwgpmiqlTdrey11s4E.jpg)
![Terror](https://image.tmdb.org/t/p/w300/17MNHSzflIgKSWkxAvicygJGHJ5.jpg)
![A Time to Die](https://image.tmdb.org/t/p/w300/zL8NdGFUe1zBpOpKqJPaOHwZFQQ.jpg)
![Blow Up](https://image.tmdb.org/t/p/w300/ngUfqvnVQ2gywG4hdmI1otXvPzX.jpg)
![Deadly Amphibians](https://image.tmdb.org/t/p/w300/51XKXS2WGVTsIl4wDHSIjgJ5kxz.jpg)
![The Return of Blackbeard](https://image.tmdb.org/t/p/w300/4McbJpoWhGH0ug8CB2QapHEZy2K.jpg)
![Terrible Leprechaun](https://image.tmdb.org/t/p/w300/mT6Nw2H4L9C23xDBLdviAFQZ3oK.jpg)
![The Lobster Man](https://image.tmdb.org/t/p/w300/1fUPUBYiGKRs44qO5XwzcUHHUR.jpg)
![Nightmare](https://image.tmdb.org/t/p/w300/v98fCfJo11yMrePyifw3yZmMSWG.jpg)
![The Abominable Snowman](https://image.tmdb.org/t/p/w300/hCud45VDkpKkSZ7lxf3nbcVU0tZ.jpg)
![Secret of the Deep](https://image.tmdb.org/t/p/w300/pSN3XlUHwLnORytP3IUvCgCMOUV.jpg)
![Man-Beast](https://image.tmdb.org/t/p/w300/mUsVwGuGLm8mjPXOxRvHpJgU3xc.jpg)
![Savage Jungle](https://image.tmdb.org/t/p/w300/gGV1iSeX9u3bam46HlQ3zimUxup.jpg)
![Flaming Ice](https://image.tmdb.org/t/p/w300/tkEvN8cwelXoRsc025qBujsP7eo.jpg)
![Attack!](https://image.tmdb.org/t/p/w300/zww6l70dgCicHqmgWe36MJT3zs9.jpg)
![Edge of Doom](https://image.tmdb.org/t/p/w300/wUvOvKwM9VjgUPflxHe2J3Cin6B.jpg)
![The Death Clock](https://image.tmdb.org/t/p/w300/wg2TlFDy4PlRmbughMhJHiQVsII.jpg)
![No Way Back](https://image.tmdb.org/t/p/w300/5mgpRADSfNdJ432djj52yTkoZPI.jpg)