Steed visits two witches, Cathy joins a motorbike gang.
The movement of a top secret rocket is compromised when of the scientists runs into gambling debts. The Invisible man realizes what might be happening and heads out on a desperate search for the missing rocket.
Master Blount, a miserly tailor, is jealous of Ulrich, the landlord of the Blue Boar Inn, which Robin and his men frequent. To implicate the innkeeper, Blount informs the Sheriff, who employs the tailor to spy for him.