Shamed former Dallas star Ken Kercheval has quietly served a three-day sentence in jail in Indiana after being caught drunk-driving last September.

The actor, who played Cliff Barnes in the 1980s soap, was pulled over for driving at night without his lights on. Police suspected he had been drinking and conducted a field sobriety test, and discovered Kercheval was well over the limit.

Kercheval, a self-admitted alcoholic, pleaded guilty to charges against him late last month and was sent straight to jail for three days. The 71-year-old also had his license suspended for a year and...