The pair began facing problems in their relationship last season when Alicia (Julianna Margulies) discovered that Kalinda (Archie Panjabi) had previously slept with her husband.
King has now told TV Line that the women's bond is the "driving force of the season".
"These are two people who probably have the biggest betrayal between them," he said. "Is it possible for them to come back from that?"
King continued: "Other events will impact that. Because right now they've warmed up a bit. But they're not there yet. But Alicia misses it, and Kalinda misses it, too."
The Good Wife airs on Sundays at 9/8c on CBS in the US and on Thursdays at 9pm on More4 in the UK.
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