Lab Rats Season 4: Bionic Island Episode 23 The Vanishing (1) 2015
Donald and Douglas reveal that they have built an upgrade for all the students bionics, except for Leo's. But the upgrade doesn't work on Adam, Bree, and Chase because their systems are older. Adam, Bree, and Chase are therefore left at their level, while all the students are much more powerful. Meanwhile, Daniel is brought to the Academy because he had been using his bionics in the outside world. Douglas decides to enroll Daniel at the Academy, and he makes Leo his mentor. Leo steadily tries to teach Daniel, but Daniel proves to be unteachable, so Leo gives him the upgrade as well. The students steadily start to vanish, including Daniel. Giselle Vickers, Douglas' old girlfriend, is revealed to have captured them. Daniel sends a video message to the Island, requesting help.
- Released: 2016-02-03
- Runtime: 22 minutes
- Genre: Comedy, Sci-Fi & Fantasy, Family
- Stars: William Brent, Spencer Boldman, Kelli Berglund, Tyrel Jackson Williams, Hal Sparks
- Director: Armen V. Kevorkian, Bryan Moore, Chris Harvey, Chris Peterson, Chris Peterson
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1. Bionic Rebellion (1) 2015-03-18
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2. Bionic Rebellion (2) 2015-03-18
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3. Left Behind 2015-03-25
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4. Under Siege 2015-04-01
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5. Bionic Dog 2015-04-08
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6. Mission Mania 2015-04-15
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7. Simulation Manipulation 2015-04-22
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8. Forbidden Hero 2015-07-01
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9. Spider Island 2015-07-08
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10. Spike vs. Spikette 2015-07-15
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11. Lab Rats vs. Mighty Med 2015-07-22
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12. Space Elevator 2015-07-29
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13. Bionic Action Hero (1) 2015-08-05
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14. Bionic Action Hero (2) 2015-08-05
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15. One of Us 2015-08-12
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16. Bob Zombie 2015-09-30
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17. Human Eddy 2015-10-14
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18. The Curse of the Screaming Skull 2015-10-21
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19. On the Edge 2015-11-11
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20. Ultimate Tailgate Challenge 2015-12-02
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21. And Then There Were Four 2016-01-13
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22. Space Colony 2016-01-20
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23. The Vanishing (1) 2016-02-03
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24. The Vanishing (2) 2016-02-03
