In response to Martin's request for assistance, a "special unit" of military troops, commanded by Col. James Caldwell (John Caresio) and traveling in the back of a light-duty, civilian truck arrives at the site.

The next day, "the world's leading authority on space emissions," Dr. Bradford (William Thourlby), arrives to direct the ongoing investigation, which includes an examination of the creature and the spacecraft's analog devices.

As the investigation proceeds, the departed creature stalks the countryside and, despite its markedly awkward and slow pace of ambulation, successfully approaches, attacks, and eats a bikini-clad girl, a housewife hanging laundry, Grandpa Brown (Jack King) and his grandson Bobby (Pierre Kopp), picnickers at a "hootenanny" (one of whom attempts to stop the creature by swatting it with a guitar), numerous teenage couples, including a blonde girl in gold pants (Louise Lawson), at a community dance hall (at which time some attendees engage each other in fisticuffs), and couples in their cars at a lovers' lane (about which the film's narrator states that "anyone who experienced that catastrophe, and survived, would never go there again.")

Bradford then explains to Martin and Brett that the creatures were "mobile" laboratories designed to consume human beings, analyze the bodies chemically to detect weaknesses, and from the spacecraft transmit the acquired information into outer space.

Silliphant's other brother, Stirling, was at the time a successful writer, having written extensively for television shows that included Alfred Hitchcock Presents and Perry Mason, and he co-created Naked City and Route 66.

[5] Principal photography began in late 1962, but instead of shooting at scenic Lake Tahoe as Silliphant had expected, a muddy pond at Spahn Ranch in Simi Valley, California was used.

[6] When the film's special effects creator was not paid for his work, he allegedly stole the original creature costume a day prior to shooting, forcing Savage and his remaining crew to assemble a poorly constructed replica.

[13] Because The Creeping Terror would not be suitable for wide release and would, at best, have been relegated to drive-in theaters and second run showings, it was sold in 1976 as part of a syndication package of films for local television stations.

[16] TV Guide described The Creeping Terror as "pure camp," and claimed it might be the second-worst horror film ever made, behind only Plan 9 from Outer Space.