Boy meets girl; boy falls in love (and had wild, non-stop sex) with girl; boy loses girl... when they discover they are brother and sister! But when he learns that he's the victim of the ultimate case of mistaken identity, the lovesick young man -- whom everyone still thinks is after some taboo thrills -- must race across the country to stop her from marrying another man.
You can now watch Say It Isn't So online on the following streaming providers in the United States.
| Directing | J.B. Rogers | Director |
| Writing | Gerry Swallow | Writer |
| Writing | Peter Gaulke | Writer |
| Production | Nancy Foy | Casting |
| Sound | Mason Daring | Original Music Composer |
| Camera | Mark Irwin | Director of Photography |
| Editing | Larry Madaras | Editor |
| Art | Sydney J. Bartholomew Jr. | Production Design |
| Art | John Philpotts | Set Decoration |
| Costume & Make-Up | Lisa Jensen | Costume Design |
| Production | Peter Farrelly | Producer |
| Production | Bobby Farrelly | Producer |
| Production | Bradley Thomas | Producer |
| Costume & Make-Up | Steve Artmont | Makeup Artist |
| Costume & Make-Up | June Brickman | Makeup Artist |
| Costume & Make-Up | Yvonne Connor | Makeup Artist |
| Costume & Make-Up | Tone Rorvik | Makeup Artist |
| Crew | Joni Avery | Stunts |
| Crew | Brent Fletcher | Stunts |
| Crew | Rick Barker | Stunt Coordinator |
| Crew | James Bamford | Stunts |
| Crew | Janet Brady | Stunts |
| Crew | Jim Dunn | Stunts |
| Crew | Jacob Rupp | Stunts |
| Crew | Gilbert B. Combs | Stunts |
