It wasn't until the end of "Bond of Fear" that I remembered John Colicos was listed in the cast and realized who he was. Wow.
Dermot Walsh plays a dad taking his family on a trip in a caravan (trailer) when a wanted criminal, Dewar (Colicos) takes over the trip, keeping the son in the caravan with him, gun in tow, and ordering Walsh not to turn him in.
This I think was one of those "quota" films done in Britain, and I found it absorbing and well acted. The little boy was a riot. He tells Dewar, "I said a prayer for you." Dewar asks, what did you pray for? The boy says, "I won't tell you. It's horrible."