- Series 1
- s01e01 - 2012-02-20 - The letter J
- s01e02 - 2012-02-27 - The letter X
- s01e03 - 2012-03-05 - The letter B
- s01e04 - 2012-03-12 - The letter O
- s01e05 - 2012-03-19 - The letter P
- s01e06 - 2012-03-26 - The letter F
- Series 2
- s02e01 - 2013-04-03 - The letter G
- s02e02 - 2013-04-10 - The letter C
- s02e03 - 2013-04-24 - The letter Q
- s02e04 - 2013-05-01 - The letter M
- s02e05 - 2013-05-08 - The letter W
- s02e06 - 2013-05-15 - The letter T
- Series 3
- s03e01 - 2014-09-03 - The letter A
- s03e02 - 2014-09-10 - The letter K
- s03e03 - 2014-09-17 - The letter N
- s03e04 - 2014-09-24 - The letter L
- s03e05 - 2014-10-01 - The letter S
- s03e06 - 2014-10-08 - The letter Z