What the critics have to say about
Bruce Greenwood in Fathers' Day

Her husband, Bob, the boy's actual father--played by Bruce Greenwood as a WASP who holds in his emotions as tightly as his buff buns--wants Scott to return on his own.
Village Voice 5/20/97

The best acting comes from Greenwood as a genuinely loving father and Julia Louis-Dreyfus
The Charlotte Observer 5/?/97

The third man is the teen-ager's acting father (played sportingly by Bruce Greenwood). This devoted husband spends most of the movie upside down in a portable outhouse that got knocked down a cliff by a careless but extremely colorful truck driver.
The Oakridger Online

The support cast of husband Bob (Bruce Greenwood) and Crystal's wife, (Julia Louis-Dreyfus) have a very strong presence. Greenwood as the father whose attempts to reach his son are hampered by extreme mishaps mainly concerning a transportable loo.
Australian E!

OK, maybe we could buy Nastassja Kinski asking for help from former lovers Crystal and Williams if her husband (Bruce Greenwood) were a jerk, an abuser or a bum. Alas, he's none of the above. In fact, after Kinski separately convinces each comic that he is the father of her 16-year-old runaway son (Charlie Hofheimer), nice guy Greenwood himself goes after the boy he's been raising as his own. By then, Crystal and Williams have run into each other on a trail filled with lame jokes and stale routines. (Poor Greenwood gets the worst of it in a messy subplot about being trapped in a outhouse.)
Cleveland Sun

One of the funniest scenes in the movie -- and something that turns into a running gag -- doesn't involve Williams or Crystal, but another man who is trapped in a port-a-john.
Providence Journal-Bulletin

The biggest laughs are likely to be generated by a gutter sequence with a man trapped in an overturned portable toilet, a scene that doesn't even feature the two stars.
San Francisco Chronicle