Tarantula! is a 1955 American science-fiction monster film produced by William Alland and directed by Jack Arnold. It stars John Agar, Mara Corday, and Leo G. Carroll. The film is about a scientist developing a miracle nutrient to feed a rapidly growing human population. In its unperfected state, the nutrient causes extraordinarily rapid growth, creating a deadly problem when a tarantula test subject escapes and continues to grow larger and larger. The screenplay by Robert M. Fresco and Martin Berkeley was based on a story by Arnold, which was in turn inspired by Fresco's teleplay for the 1955 Science Fiction Theatre episode "No Food for Thought", also directed by Arnold. The film was distributed by Universal Pictures as a Universal-International release, and reissued in 1962 through Sherman S. Krellberg's Ultra Pictures. Plot A severely deformed man is found dead in the Arizona desert. Dr. Matt Hastings, a doctor from the nearby town of Desert Rock, Arizona, is called in by the sheriff to examine the body. It appears to be that of biological research scientist Eric Jacobs, an acquaintance of Hastings'. Jacobs' colleague, Dr. Gerald Deemer, says Jacobs died of acromegaly, but Hastings is unconvinced, since acromegaly takes years to reach its current state. Deemer acknowledges that Jacobs's development of acromegaly was rapid, over just four days, but insists that such anomalies are to be expected on occasion. In his home and research laboratory in an isolated desert mansion, Deemer keeps rabbits, white rats, hamsters, and a tarantula, all of enormous size, some as large as Golden Retrievers. Deemer's assistant, doctoral student Paul Lund, is now deformed like Jacobs, and attacks Deemer, smashing the glass covering a tarantula's cage and setting the lab aflame in his rampage. Lund grabs the hypodermic needle that Deemer was using on the lab specimens and injects him with the contents. As flames engulf the lab, the tarantula leaves and Lund collapses and dies. Deemer regains consciousness, grabs a fire extinguisher, and puts out the fire. That night, Deemer buries Lund in the desert. A newcomer to town, Stephanie Clayton, nicknamed "Steve", has signed on to assist in Deemer's lab. Told by the hotel clerk that she will have to wait until the only taxi returns, she accepts a ride from Hastings, who is also going to Deemer's lab. At the mansion, they encounter local journalist Joe Burch, who is asking questions about Jacobs's death,