In the MacGyver episode “CO2 Sensor + Tree Branch,” Mac (Lucas Till) participates in a challenge for government operatives to create robotic combat machines. When he gets to the site, he reunites with CIA operative Allie, who is also competing. And yes they were once a thing or had a fling. During the challenge, Allie’s vehicle is hacked and heads to the Pentagon. It’s up to Mac to save the day.
Allie is portrayed by triple threat Ashley Tisdale. The singer-dancer-actress is known for her roles on Sons of Anarchy (Emma Jean), Hellcats (Savannah Monroe), The Suite Life of Zack and Cody (Maddie Fitzpatrick), and in the High School Musical movies (Sharpay Evans) and Scary Movie 5 (Jody), among others. MacGyver airs Fridays at 8pm on CBS, right before Hawaii Five-0. [You can also stream 9000+ episodes and live TV with a CBS All-Access free trial.]