Secrets and Words·BBC One
All episodes
1 season · 5 eps
Season 1
S1 · E1
45 min
S1 · E1
45 min
S1 · E2
45 min
S1 · E2
45 min
Help Me If You Can Episode 2
S1 · E3
45 min
S1 · E3
45 min
A Study in Time Episode 3
S1 · E4
45 min
S1 · E4
45 min
The Crossing Episode 4
S1 · E5
45 min
S1 · E5
45 min
Mightier Than the Sword Episode 5
5 episodes in Season 1
Some details come from TheTVDB.