When does Newhart return?

Newhart is an American television sitcom that aired on CBS from October 25, 1982, to May 21, 1990, with a total of 184 half-hour episodes spanning eight seasons. The series stars Bob Newhart and Mary Frann as an author and his wife who own and operate the Stratford Inn in rural Vermont. The small town is home to many eccentric characters.
Bob Newhart plays Dick Loudon, an author of do-it-yourself and travel books. The town is populated by oddballs whose behavior never ceases to bemuse the mild-mannered everyman. The final episode reveals that the entire series was a dream of Newhart's character Robert Hartley.