|Behind the scenes|
Peter is Marco's father. Peter married Eva several years before she became the host to Visser One. After Visser One faked Eva's death on a boating accident. Believing that his wife was truly dead, Peter lived as a single parent for some time, but eventually started dating. Peter eventually married Nora Robbinette not knowing Eva was still alive.
When the Yeerks heard about Peter's development of Z-space transmissions, they did their best to infest him. It was because of this event that the Animorphs had to reveal themselves to him. The Chee helped stage both Marco and Peter's deaths, and they were relocated to the Hork-Bajir valley. Not long after this, Peter was reunited with a free Eva. They both lived in the Hork-Bajir valley until the end of the war and aided the Animorphs on occasion.
- On the Animorphs television series, Peter is named Jeremy.
- He is also named Jeremy on earlier promotional materials such as Marco's animorphs ID card