Zach Franklin was going crazy, he had to find out if Sara his wife was fooling around behind his back. For months he had suspicions Sarah was seeing Richie Benning, one of Zach’s work colleagues. Sara would become secretive if Zach ever asked her where she had been, even if was just a casual question. It was when he found a printed email that had come from Richie in Sara’s papers. It wasn’t obvious but it gave him cause to think. When he found a key on her key ring he didn’t recognize Zach was sure. He managed to get the key copied and in a moment of total paranoia went to Richie’s house one lunchtime and tried it. When it clicked and opened the front door of Richie’s house, Zach almost cried.

When Zach was producing the Doppelganger formula notes into something more readable than what the boffins had hand written he got an idea. He produced a copy of his own and went to work on reproducing it.

Finally Zach was ready, he told Sara he had to go out of town for work for a couple of days with Richie Benning. Of course he wasn’t but Richie was. He planned to go to his place switch himself into Richie with the formula and pay a visit to his wife. He wanted to see what they got up to, then expose her, and what better way? He’d just tell Sarah that he, as Richie had cancelled his trip and Zach had gone alone. This meant he’d have the whole time he was supposed to be away to be Richie.

Zach went to Richie’s and let himself in, after leaving his car at the airport. After making himself familiar with his surroundings, Zach went to work. He went to the bathroom and looked at the toothbrush holder. Slipping the end of the brush into his batch of the formula Zach had a scotch and waited. Ten minutes later he went to the formula which had changed color. Zach removed the brush washed any formula off it and put it back. He took the vial of Doppelganger and headed to Richie’s bedroom. He wandered into the large walk in robes looking for something to wear as he and Zach were quite different in build. He was shocked to see a whole section that was clearly female attire. That some of it was familiar saddened Zach. With a surge of anger Zach downed the mixture and waited. The changes were complete quickly but there was a problem, he wasn’t Richie... he was Sara! It must have been her toothbrush! Zach realised this as he looked in the mirror at his wife’s shocked face.

He didn’t know what to do as there was no more formula and he’d left the rest hidden at his own place. He was going to show Sara who he really was after a few days. As he wondered what to do the effects of the change began to tire Zach. He was very soon in a deep sleep.

To say Zach was surprised to hear a door opening to Richie's apartment was an understatement. Seeing Richie standing in the bedroom doorway caused Zach to freeze in fear. Here he was laying on Richie's bed, naked and with a body exactly like his wife's.

"Hi babe, I thought you'd read between the lines about me going out of town the same time as your hubby. Saves me calling you and risking exposure." Richie spoke with familiarity.

"Um, yeah, well I took a chance on that Richie." Zach stumbled over his reply and prayed the game wasn't up.

"Clever cookie, so how long have we got together?"

"Um, until Zach comes back I guess." Zach was trying to think how he could get out of this disaster.

"Great, so your mine until then. This is going to be so much fun Sarah. I'm going to make the most of the opportunity babe." Richie said.

"Sure Richie," Zach replied numbly.

With that Richie was on the bed kissing his girlfriend. Zach was caught by surprise and Richie's tongue in his mouth and his hands on his arse freaked Zach out. He broke the embrace sighting the need to use the bathroom. In a flash Zach was alone again as he tried to gather his thoughts. The feeling of Richie's body being up so close and personal even fully dressed as he was shook Zach's psyche to the core. How the hell was he going to be Sara and not go any further? As time ticked on Zach knew that he had little choice, if he exposed the lie to Richie he'd be through professionally and personally, same went if he told Sara probably. His whole plan was upside down now. He was Sarah right now, in this chunk of reality and nothing would change that. With a sigh Zach left the sanctuary of the bathroom. Seeing Richie laying on his bed in only his briefs caused Zach to do a double take. Zach was in a pickle now!