Her highly successful career insured her with the highest respect in the governmental ranks until she was revealed to be the mole known as ‘Chrysalis’ and arrested for treason.
In the Pilot Episode, the DXS agents Angus MacGyver (Lucas Till), Jack Dalton (George Eads), and Nikki Carpenter (Tracy Spiridakos) infiltrate a party in Italy to steal a biological weapon from a terrorist. The mission goes awry, with Mac and Nikki getting shot and falling into Lake Como. While Mac survives, the bioweapon is stolen and Nikki’s body can’t be retrieved.
Jack suggests recruiting Riley Davis (Tristin Mays), a hacker who’s currently serving time in prison. Riley is the daughter of Jack’s ex-girlfriend Diane (Michael Michele) and manages to track the bad guy Kendrick and the bioweapon – and Nikki, who’s apparently still alive and working with Kendrick.
At the end of the episode, the DXS packs shop and rises under a new think-tank-cover called the Phoenix Foundation. Thornton agrees to let Riley stay on probation; teaching her some martial arts skills herself.
In Episode 1×12 (Screwdriver), it’s revealed that Nikki worked undercover for the CIA to bring down the Organization and the mole that infiltrated DXS/Phoenix. As it turned out, Thornton had framed Nikki and hired Murdoc (David Dastmalchian) to take out MacGyver. Thornton is arrested and later replaced by Matty Webber (Meredith Eaton), Jack’s former boss at the CIA.
In Episode 1×17, an overseas mission goes terribly wrong when Mac and the team are blamed for a terrorist bombing and the Phoenix Foundation is forced to disavow them. As it turns out later, it had been Thornton luring them into a trap; setting everything up while still being in prison.
Reboot series (Season 1)1×01 The Rising
1×02 Metal Saw
1×04 Wire Cutter
1×07 Can Opener
Patty (by Jack Dalton)
LINK TO ORIGINAL SHOW:
Her alias in the Pilot Episode is “Miss Elcar”, an obvious nod to Dana Elcar who played Peter (Pete) Thornton in the original series, of which this role is the rebooted version of.