It’s official: Jessica Walter’s career is on fire!

The inimitable Arrested Development matriarch, who is currently juggling her Archer voiceover duties with a starring role in the new TV Land sitcom Retired at 35, has booked a guest stint on CBS’ The Big Bang Theory.

Sources confirm to me exclusively that Walter will play Barbara Latham, a wealthy donor to the university whose upcoming grant to the science department may be contingent upon Leonard (Johnny Galecki) compromising his virtue.

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The episode, slated to air in February, also features a guest turn by The West Wing‘s Josh Malina as university president Arlo Seibert, whose “one of the guys” attitude wears thin on Sheldon (Jim Parsons) and Co.