Part 1

S01 E01 • Sunday, Jan 4, 1981 • Jan 4 • 25m

Six months before his 18th birthday, Billy Stanyon's mother and father die in a sailing accident. They leave him a flute, some letters, and the knowledge that they were not his biological parents.

Part 2

S01 E02 • Sunday, Jan 11, 1981 • Jan 11 • 25m

Billy visits his birth mother's old house in London, where he encounters fugitives from an anti-apartheid demonstration.

Part 3

S01 E03 • Sunday, Jan 18, 1981 • Jan 18 • 25m

Billy meets the mysterious Vincent Whitaker, who accompanies him to Munich where an ex-client of Whitaker's takes them to Lake Chiemsee. Frau Gruber tells Billy his mother was killed whilst crossing the Hungarian border, along with her own son. But is she telling the truth?

Part 4

S01 E04 • Sunday, Jan 25, 1981 • Jan 25 • 25m

Now in his final term, Billy learns his birth father, Jerry Toff, defected to Britain in 1955 and married, then later divorced, a glass heiress. Along with his best mate Spike and other classmates, he has a run-in with a local motorcycle gang.

Part 5

S01 E05 • Wednesday, Feb 4, 1981 • Feb 4 • 25m

An unannounced visit to his father's ex-wife Charlotte in Scotland reveals that Billy has an older half-sister named Pamela. He learns little other than that his father and Charlotte met when he worked as a stable lad on her father's estate.

Part 6

S01 E06 • Sunday, Feb 8, 1981 • Feb 8 • 25m

Billy seeks help to pursue his goal of becoming a professional flautist. Meanwhile, a runaway family take refuge in his seaside cottage.

Part 7

S01 E07 • Wednesday, Feb 11, 1981 • Feb 11 • 25m

Billy visits France where he learns more about his parents and helps his hosts' son fulfill a family tradition.

Part 8

S01 E08 • Sunday, Feb 15, 1981 • Feb 15 • 25m

Spike arrives unexpectedly. Billy offers to put him up for the night, causing friction between him and Mr Whitaker.

Part 9

S01 E09 • Wednesday, Feb 18, 1981 • Feb 18 • 25m

Frau Gruber sends Billy his father's ring, prompting him to return to Lake Chemsee for answers. However, she will only tell him that the search for his natural father only spells peril.

Part 10

S01 E10 • Sunday, Feb 22, 1981 • Feb 22 • 25m

Billy befriends a teenage runaway who stays the night with him at his seaside cottage. Meanwhile, Mr Whitaker receives an unexpected home visit from Miss Price.

Part 11

S01 E11 • Wednesday, Feb 25, 1981 • Feb 25 • 25m

An unannounced visit by Mrs Dalgleish, originally from Hungary but now the colourful and wealthy widow of a financial tycoon, affords a few more details about Billy's birth parents.

Part 12

S01 E12 • Sunday, Mar 1, 1981 • Mar 1 • 25m

Part 13

S01 E13 • Wednesday, Mar 4, 1981 • Mar 4 • 25m

In Salzburg to audition for a music scholarship, Billy finds himself followed by Hilda Gruber. Instructed to kill him, she chooses instead to tell him that it was his father who died fleeing Hungary, not Karl Gruber.