[2] Gregory, beside his main role on ALF, appeared in several television shows which included Fantastic Max (1988–1990), Pound Puppies (1986–1987), Murphy Brown (1988), Fantasy Island (1978), The A-Team (1984), T.J. Hooker (1984), Amazing Stories (1985), The Twilight Zone (1985), and Mr. Boogedy (1986).
[3] Gregory made several appearances on the television sitcom Punky Brewster,[2] playing an orphan named "Dash," and supplied the voice of Edgar the Mole in the animated feature Once Upon a Forest (1993), which would be his final acting role.
[5] On June 13, 2024, Gregory and his service dog were found dead inside a car at a Chase Bank parking lot in Peoria, Arizona.
[2] Pending an investigation of the cause, and allowing the family time to mourn, the death was not publicly announced until July 11.
[2] His sister said he had bipolar and sleep disorders, and likely died of heat stroke after falling asleep in his car.