Complex sentence: During 1994, "EastEnders" aired typically two half-hour episodes in a time slot of 7.30pm on Tuesday and Thursday, until 11 April 1994 when a third episode was added on Mondays in a time slot of 8.00pm.
Split into simpler sentences: During 1994, "EastEnders" aired two half-hour episodes in a time slot of 7.30pm on Tuesday and Thursday. Until 11 April 1994 when a third episode was added on Mondays, in a time slot of 8.00pm.