Translation:My aunt has to appear on television tomorrow.
I am vex here. Other times DL says 'tiene que' means 'has to, will' and 'must' is debe. Yet this time 'will' was denied. Will report to DL
I think every possible form of 'aunt' should be accepted, since it's more of a cultural/family thing than an English language issue.
You say en televisión, since it means "on television", while el televisión means "the television".