I guess Raj can't afford to move in there.

@Knixon said:

That since 3A is empty, that means Mrs Gunderson ("Good morning, Leonard. Or should I say, 'yee haw!'?") is no longer living there?

I can't believe I didn't notice that! Her potted plant was even gone and it didn't hit me. Mrs. Gunderson was often a "go-to" for me during hijinks on the old board. Maybe she won the lottery and is now living in Raj's old apartment.

No potted plant likely became their cue that they were on THEIR floor, and that's why they went into the wrong place. Although why it wasn't locked, is another question.

@Knixon said:

That since 3A is empty, that means Mrs Gunderson ("Good morning, Leonard. Or should I say, 'yee haw!'?") is no longer living there?

I wonder if there will be some mention of that in an upcoming episode. Leonard and the others didn't seem to be surprised. So I guess that means the Air Force didn't accidentally kidnap her by mistake, instead of one or more of the guys.

I thought she had to flee because Batman found out who she really was.