There was no time travel in the food investigation, but at the start of Tockson’s memo, he refers to a previous investigation that took him to 15th century Italy. I found one later Tockson story, “Ask Penny Jupiter,’ but it was timetravelless.
“I’m not especially mad,” you answered, growling. “but the Time Travel Overseeing Community wasn’t much pleased. You shouldn’t have dropped in on Leonardo da Vinci with those tips on aerodynamics.’