Published in Joe 90 Top Secret #11, 03/29/1969 - cover and 3 pages.
"Mountaineer Joe Makes A Daring Rescue Bid!" A W.I.N. agent has gotten a Chinese top secret cipher machine and is crossing the Himalayan Mountains. The Chinese sent fighter aircraft to stop him which fired a rocket which caused an avalanche which knocked the agent into a crevasse. After absorbing the brain pattern of a mountain climber, Joe 90 is flying there to rescue him.