Adam B. Vary Senior Entertainment Writer SPOILER ALERT: This story discusses plot developments in Episode 3 of “She-Hulk: Attorney at Law,” currently streaming on Disney+. Roughly two weeks before shooting the third episode of Marvel Studios’ “She-Hulk: Attorney at Law,” head writer Jessica Gao pulled aside star Tatiana Maslany — who plays lawyer Jennifer Walters (aka She-Hulk) — to tell her who the show had cast for a crucial cameo in the episode. Jennifer’s former colleague at the D.A.’s office, chronic mansplainer Dennis Bukowski (Drew Matthews), sues an Asgardian shapeshifter for fraud, after she tricked him into dating her by transforming into a massive celebrity that Dennis had no chance in hell of actually dating.