Since I saw this in Goulburn in the 70s I've been looking for it, it's a 60s or 70s UK TV movie short movie.
The plot goes like this: an alien man was talking to a young girl in the family TV set, the cat got lost in the TV set, the brother got tied up by a rope that came out of the TV set, then the girl got the Alien man to come out of the TV and held his hand while the shocked parents looked on. The alien guy would talk to the girl when no one else was around.
I'd really appreciate any help, I just have to see it again.