

91 minutes
12/20/1957
Pekka Puupää and Pätkä, who return to Helsinki from an unsuccessful variety show tour, are forced into refresher training, where they are trained as frogmen. During the diving exercises, the friends encounter the mermaid Helmi, whom they help into the bathtub at home, to Justiina's shock. The friends, who have become civilians, eventually end up on a plane bound for Suez, being cornered by UN soldiers.

Esa Pakarinen
as Pekka Puupää

Masa Niemi
as Pätkä

Siiri Angerkoski
as Justiina Puupää

Sirkka-Liisa Wilén
as Helmi

Armas Jokio
as Pikkarainen

Pentti Viljanen
as Saastamoinen

Pentti Irjala
as Vääpeli

Juhani Kumpulainen
Irja Kuusla
as Mattsonska

Tommi Rinne
Otto Noro

Mikko Niskanen
as UN-soldier #2
Leena Pulkkinen
Raili Kuusisto
Martti Seilo
Nestori Lampi
Einari Ketola
as Kalle Kovanen

Spede Pasanen

Matti Aulos
as Referee
Matti Dahlberg
as A.K. (uncredited)

Anton Soini
as V.P. (uncredited)
Fiinu Autio
as Amalia (uncredited)
Sacy Sand
as (uncredited)
Erkki Poikonen
as (uncredited)
Kalle Sulkunen
as (uncredited)

Saulo Haarla
as (uncredited)
Sirkka Breider
as (uncredited)
Hannes Veivo
as (uncredited)

Kaarlo Wilska
as (uncredited)

Matti Lehtelä
as (uncredited)
Vilho Ruuskanen
as (uncredited)
Arvo Murtokallio
as (uncredited)
Heikki Kuvaja
as (uncredited)
Heimo Karppinen
as (uncredited)
Viljo Voipio
as (uncredited)
Vihtori Välimäki
as (uncredited)
Pentti Taivainen
as (uncredited)
Jussi Hirki
as (uncredited)
Pentti Lähteenmäki
as (uncredited)
Matti Kuusla
as (uncredited)
Anu Kilpiö
as (uncredited)

Uljas Kandolin
as (uncredited)

Heimo Lepistö
as (uncredited)
Alf Salin
as (uncredited)
Aarre Lepistö
as (uncredited)
Niilo Ihamäki
as (voice) (uncredited)