Thanmathra (English: Molecule) is a 2005 Indian Malayalam-language drama film written and directed by Blessy, based on Padmarajan's short story "Orma".

His biggest ambition is to see that his son gets into the IAS (Indian Administrative Service), something he himself had failed to achieve despite being a brilliant student.

What starts as commonplace omissions and absentmindedness, quickly grows into handicapping cognitive and behavioral impairments.

The family is devastated by the sad news, but tries to adjust to the situation with a lot of determination underscored by strong emotional bonds.

The music of this movie is composed by Mohan Sithara and the lyrics by Bharathiyar (Kaatru Veliyidai) and Kaithapram.