Complex sentence: Although the last original episode aired in March 1976, NBC aired reruns until June, because of a technical strike affecting the network; this marked one of the first instances of a network employing repeats of a first-run game show to fill a time slot.
Split into simpler sentences: Although the last original episode aired in March 1976, NBC aired reruns until June, because of a technical strike affecting the network. This was one of the first instances of a network employing repeats of a first-run game show to fill a time slot.