PRE-EMPTED - 4/10/67

The episode originally intended for broadcast today was pre-empted by the American Federation of Television and Radio Artists strike.

From Wikipedia.com:

In 1967, AFTRA members called the union’s first national strike on March 29, 1967, after negotiations broke down over staff announcer contracts at owned-and-operated stations in New York, Chicago, and Los Angeles and over first-time contracts for “Newsmen” at networks and owned-and-operated stations. Since AFTRA adhered to a bargaining principle that no general agreement exists until all Codes and Contracts are acceptable, the 13-day strike involved all 18,000 members in more than 100 locations across the country. Agreement was reached on the outstanding issues at 8:05 pm, EST, on Monday, April 10, 1967—just in time to allow broadcast of the annual Academy Awards program live from the Santa Monica Auditorium.

 In place of Dark Shadows, the 1956 feature film The Man Who Never Was was broadcast.

Fortunately the strike was resolved quickly, allowing today's episode to run tomorrow.