Episode Overview
In 1956, Doug and Tony make their way to Russia, where the Tunnel team attempts to reach them using perilous F-5 probes. Their final message instructs the duo to impersonate defecting scientists and gather intel on Project A-13. Back in the present, General Parker questions scientist Biraki about his ties to the project. The duo discovers that in 1956, Biraki is developing a Time Tunnel for the Russians, overseen by Hruda. Realizing the project is on the verge of failure, they attempt to flee but are recaptured. They uncover that Alexis is a double agent. With the Tunnel team's assistance, they survive the probe and sabotage Biraki's work. The Tick-Tock staff report to Parker about Biraki's vendetta against them for the destruction of his Tunnel. After their escape, Doug and Tony are sent to a different time period.