Highway to Heaven is an American television drama series which ran on NBC from 1984 to 1989.
The Pilot was filmed from March to April 1984; Season 1 was filmed from August 1984 to March 1985.
Season 2 was filmed from July 1985 to March 1986.
It's presently unclear when Season 3 began filming, but it can be confirmed that filming wrapped in March 1987.
Season 4 was filmed from May 1987 to March 1988. The show managed to finish filming this Season just as the 1988 WGA Strike was about to begin.
Season 5 was filmed from August to December 1988. Only the first three episodes aired that year, with episode 4 airing in March 1989, and the last nine episodes airing later that summer. Many of the episodes this season were released posthumously after the death of Victor French on June 15, 1989, with the last episode airing on August 4 of that year.