Lawrence's plan

Here's when Lawrence reveals the plan for USR in Weekenders in I, Robot.

[we see Lawrence Robertson in a chair as the guard, Spooner, Calvin, and the heroes come in]

Robertson: Mr. Spooner. We both know you're not here on police business.

Spooner: That's right, I'm just a 6', 200-pound civilian.

Tino and Brian: Spooner!

Calvin: Detective!

Spooner: Here to kick another civilian's butt.

[The guard grabs Spooner's arm, but his robotic hand squeezes his arm in causing the guard to go in pain]\

Lawrence: Stop. You can allow him to express himself.