Six months after Ocean Pioneer I was lost, Ocean Pioneer II was launched from Clydeside Dockyard by Lady Penelope Creighton-Ward, who was the guest of Lord Worden. The launch was a success, but Lady Penelope told the TV reporter that "the bottle of champagne didn't quite break with the pop she expected". Unbeknown to her Parker had switched it with a bottle of soda water, and was sat in FAB 1 with Stevens (a fellow chauffeur) drinking it!
The Gantry[]
Several guests can be seen on the gantry, including the cameraman and reporter.
Other Appearances (Isn't That...?)[]
- 1. World TV Cameraman: previously seen as Carl in The Man From MI.5
- 2. TV Reporter
- 3. Young boy was also Bob Williams seen in Cry Wolf.
- 4. Lady in fur hat: Blanche Carter
- 5. The Mayor, was also Professor Holden in The Mighty Atom.
- 6. Man in naval uniform was the Ocean Pioneer l Commander, seen earlier in the episode.
- 7. Lady Penelope
- 8. Man with brown hair, was also Dave Clayton in Day of Disaster.
- 9. Man in blue polo neck was Tidman in The Man From MI.5.
- 10. Man with face partly hidden: Southern
- 11. Lord Worden
- 12. Man with grey hair and glasses: Lambert
- 13. Man with moustache was also Lord Silton in Vault Of Death.
The Onlookers[]

High up above the gantry were two onlookers, one of which dropped his hat onto the gantry below and spoke with a Scottish accent.
Other Appearances (Isn't That...?)[]
- 1. Scottish Onlooker also had cameo roles in The Duchess Assignment and The Perils of Penelope.
- 2. Onlooker with beard, was also seen in the Art Gallery in The Duchess Assignment.