[s1e19] Compass Instant

: Mac creates an electric whip from a cut extension cord to defend the team against the gunmen pursuing Frankie.

: The story reveals Mac’s past at MIT, including the fact that he was enrolled at age 17 and had a major crush on Frankie. Further Story Development [S1E19] Compass

If you are looking to develop this specific plot further, common fan theories and follow-ups focus on: : Mac creates an electric whip from a

After hearing that Frankie died in a lab fire, Mac travels to MIT with , who is on mandatory medical leave with a broken arm. Their investigative instincts kick in when they notice a suspicious man at the memorial and learn that Frankie's supervisor also recently died in a mysterious car crash. Their investigative instincts kick in when they notice

: Frankie’s DNA research could be linked to future "Phoenix Foundation" cold case files or Mac's own family history.