I'm for the Hippopotamus

Two men engage in a semi-friendly rivalry at the beginning of the film. Hill's character occasionally ruins the other's hunting safaris. It turns out that Spencer's character is none too honest, either, since he gives his tourists rifles loaded with blanks so they can't hurt each other or the animals. The two have to team up to stop a villain, with plenty of comedy, eating, and mild violence.

• Terence Hill as Slim
• Bud Spencer as Tom
• Joe Bugner as Ormond
• May Dlamini as Mama Leone
• Dawn Jürgens as Stella (Slim's lady-love)
• Malcolm Kirk as Ormond's bald henchman
• Ben Masinga as Jason
• Les Marcowitz
• Johan Naude
• Nick Van Rensburg
• Hugh Rouse as Police Captain, arresting Slim and Tom
• Mike Schutte as Ormond's henchman (German version: Lumpi)
• Kosie Smith as Ormond's henchman with moustache (German version: Kopf, wie 'n Hauklotz)
• Joseph Szucs
• Sandy Nkomo as Senghor (Stella's father)

As with many other Spencer & Hill films, its soundtrack and theme song "Grau Grau Grau" (both composed and performed by Walter Rizzati, with Spencer himself providing lead vocals on the song) became very popular in Italy at the time of the film's release, and are still popular among the duo's international fan base.

• Io sto con gli ippopotami on IMDb
• I'm for the Hippopotamus at Rotten Tomatoes