An Echo of Theresa

The film follows American businessman Brad Hunter and his wife Suzy as they visit England for the first time. An innocent introduction turns sinister when Brad mistakenly refers to Suzy as "Theresa." His subsequent strange behavior and unexpected knowledge of London raise suspicions, prompting Suzy to hire a private detective to uncover the truth behind her husband's altered personality.

As part of the British TV "Thriller" series, An Echo of Theresa aired in the UK, but was also released in the U.S. under the title Anatomy of Terror. This dual identity adds an interesting layer for collectors, showcasing how titles can differ across regions. The film features a cast including Polly Bergen, Paul Burke, and Dinsdale Landen, contributing to its unique character and storytelling.