Michael J. Fox says his emotional but brief guest appearance this week on his former series, "Spin City," is coming at the right time.
Fox left the ABC comedy last year amid his struggle with Parkinson's disease and was replaced by Charlie Sheen.
"It really would have been strange if I had gone back last season," Fox told the Los Angeles Times. "It would have been very awkward for Charlie. But now it's established its own identity."
The first two of the three episodes featuring Fox are to air back-to-back Tuesday. The third is set for next week.