Sarah Chalke joins Rob Riggle’s 48 Hours ‘Til Monday

Chalke established her situation comedy bona fides with nearly a decade of distinguished service on Scrubs, as well as 70 episodes as the Conner family’s eldest daughter, rebellious shape-changer Becky, on Roseanne. In fact, along with her recurring roles on How I Met Your Mother, Cougar Town, and, most recently, Backstrom, Chalke has been on TV more or less constantly for the last 15 years, making her, essentially, the anti-Rob Riggle. We can only hope 48 Hours showrunner Charlie Grandy is wise enough to minimize contact between the two, lest their Riggle and anti-Riggle particles collide, annihilating everyone on set except Jane Curtin, who will deliver a perfectly timed joke about the explosion, because Jane Curtin is a professional.