Season 2
Episodes
1 Partners in Crime Jan 10, 1961 2 Clue of the New Pin Jan 25, 1961 3 Man in the Back Seat Jun 1, 1961 4 The Fourth Square Jul 4, 1961 
5 Man at the Carlton Tower Jul 15, 1961 
6 Clue of the Silver Key Jul 27, 1961 7 Seven Keys Aug 1, 1961 8 Attempt to Kill Aug 12, 1961 9 House of Mystery Aug 16, 1961 
10 Man Detained Oct 16, 1961 11 Never Back Losers Oct 27, 1961 12 The Sinister Man Dec 13, 1961
5 Man at the Carlton Tower Jul 15, 1961 6 Clue of the Silver Key Jul 27, 1961 7 Seven Keys Aug 1, 1961 8 Attempt to Kill Aug 12, 1961 9 House of Mystery Aug 16, 1961 10 Man Detained Oct 16, 1961 11 Never Back Losers Oct 27, 1961 12 The Sinister Man Dec 13, 1961