Max Wright later said that while he disliked working on the show, he got satisfaction from fan letters sharing how much joy and happiness the show brought them.
The ALF puppet was operated from various trap doors hidden within the set, making filming more hazardous than a normal sitcom. The cast had to remember where the doors were, so they could avoid them.
In the years since the show was canceled, Max Wright and Anne Schedeen have said that tensions were very high on the set. The show's technical demands made for very long shooting schedules, and none of the actors enjoyed playing supporting roles to a puppet who always had the best lines.
Reportedly, tensions on the set were so high during the fourth season that Max Wright attacked the ALF puppet and screamed, "Put us all on sticks! We're all puppets!"
Because of the show's technical demands, and to avoid revealing its secrets, the show was taped on a closed studio set with no audience. A laugh track was used to make it sound like it was recorded in front of a live audience.