"I was a big fan of 'Perry Mason,'" said Al Franken, the junior senator from Minnesota who took office only last week.
Apparently neither one of them would do very well on a "Perry Mason" trivia quiz.
"What was the one case in 'Perry Mason' that [Hamilton] Burger [the district attorney] won?" Franken asked.
"I wish I remembered the name of the episode, but I don't," Sotomayor said. "I just was always struck that there was only one case where his client was actually guilty."
"And you don't remember that case?" Franken asked.
"I know that I should remember the name of it, but I haven't looked at the episode," Sotomayor said.
"Didn't the White House prepare you for that?" Franken asked laughing.
Senator Franken didn't know either – but CBS News looked it up – it was the "Case of the Deadly Verdict."
Watch the exchange below.