Agents of SHIELD’s lucky double 7s episode is just what it says on the tin: Deke and Mack’s excellent and not so excellent adventures while stranded in the 1980s after the Zephyr’s time drive goes on the fritz. They get stranded when Mack needs some alone time after the untimely deaths of both of his parents in 1976 at the hands of the Chronicoms. Introvert Mack takes the rest of 1982 and much of 1983 as much needed “me time” to process everything that’s happened to him, probably going back to when he joined SHIELD in S2. Maybe even back to the death of his infant daughter, Hope.
Extroverted Deke makes himself at home in the Lighthouse- wait, that is his home. Poor guy, he can never get away from it. At least he always knows where he can live, rent free, in every era. Always landing on his feet is Deke’s talent, so he gets to work exercising it by creating a cover band that’s also his spy team, with the band as their cover identity. Get it?
He also keeps an eye on Mack, whether Mack wants him to or not.