How Late Can You Say the Evening Shema?

Part 1: You can fulfill the commandment until sunrise. The Rambam disagrees.

Part 2: An analysis of the difference between the Babylonian and Jerusalem Talmuds. The logic behind the Rambam’s ruling.

Part 3: If you forget to say it by the deadline, do you get extra time to fulfill the commandment? The Rambam rules according to the Jerusalem Talmud.

Part 1
Part 2
Part 3