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Columbia's heartwarming "Rusty" series came to a close with Rusty's Birthday. As in previous series entries, the doggie hero is played by "Flame", while his human master Danny Mitchell is portrayed by Ted Donaldson. This time, Rusty is taken to parts unknown by a group of tourists who think they've bought the pooch. Later on, Rusty falls into the hands of a migrant worker (Ray Teal) and his family. The worker is a decent sort, meaning that a happy ending is in the offing. Featured as the migrant's son is Jimmy Hunt, later to achieve fame as the youthful protagonist of the 1953 sci-fi classic Invaders from Mars.