Bill Bixby, Valerie Perrine and Jose Perez top the cast of Bruce Jay             Friedman's off-Broadway comedy hit in which heaven is portrayed as a steambath   and God is its seemingly ordinary attendant, doling out blessings and wrath as   he scrubs the tiles. Videotaped for PBS.                                       Burt Brinckerhoff---USA---1972---90 mins.