Apparently feeling it’s found the prescription for its Friday woes, CBS has ordered five more episodes of the new series “Diagnosis Murder,” bringing the total commitment to 13 hours.

The Dick Van Dyke vehicle from producers Fred Silverman, Dean Hargrove and Viacom Prods. posted a 10.7 rating, 20 share in its series premiere last week, following three movies featuring the character, spun off from a “Jake and the Fatman” segment.

Relying on “Murder” in the lead-off hour Friday means the network will sacrifice some demographic appeal in order to keep the lights on in terms of households, having stumbled out of the starting gate with two sitcoms, “It Had to Be You” and “Family Album.”

“Diagnosis Murder” becomes only the third CBS show to receive an additional-episode order so far this season, joining “Dave’s World” and “Harts of the West.” Three other series –“The Trouble With Larry,””Angel Falls” and “South of Sunset”– have been canceled.

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