Season 1, episode 28.
Original air date: 2 April 1956.
Cast: Richard Greene (Robin Hood), Archie Duncan (Little John), Alexander Gauge (Friar Tuck), Bernadette O`Farrell (Maid Marian), Jane Asher (Alice A` Bland), Peter ASher (Oswald A`Bland), Arthur Skinner (Arthur A`Bland), John Longden (Walter FitzUrse), Willoughby Gray (Sergeant at arms), Charles Stapley (Dick the smith/ outlaw), John Dearth (John the cook/ outlaw), Paul Connell (Serf/ outlaw: uncredited)and Victor Woolf (Jailer/ Derwent: uncredited).
From IMDB.

At 26 minutes, this is a more-intact episode than usual. The plotline is simple: A man is falsely accused of murder, and his two children are made into servants for the leader of area. In all turns out fine in the end for all involved (SPOILER SPOILER except for the true murderer, found with the stolen murder weapon END SPOILER). The print is purely black and white, compared with the slightly greenish or blue-ish prints usually seen.

Uploaded by the wonderful "Lum", this episode proves that YES, you can produce 39 episodes a year and still make a classic drama-adventure-comedy.